diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/ComposingTextV2.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/ComposingTextV2.swift
index efaf74f..610387b 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/ComposingTextV2.swift
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/ComposingTextV2.swift
@@ -28,6 +28,11 @@ struct ComposingTextV2: Hashable, Sendable {
         self.convertTarget = Self.buildConvertTarget(input)
     }
 
+    mutating func append(_ string: String, inputStyle: InputGraphInputStyle.ID) {
+        self.input.append(contentsOf: string.map {.init(value: $0, inputStyle: inputStyle)})
+        self.convertTarget = Self.buildConvertTarget(input)
+    }
+
     mutating func removeLast(_ k: Int = 1) {
         let rest = self.convertTarget.dropLast(k)
         typealias Item = (value: String, inputStyle: InputGraphInputStyle.ID)
diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraph.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraph.swift
index b94de3e..1f6a28a 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraph.swift
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraph.swift
@@ -86,16 +86,16 @@ struct CorrectGraph {
     }
 
     @discardableResult
-    mutating func update(with item: ComposingText.InputElement, index: Int, input: [ComposingText.InputElement]) -> IndexSet {
+    mutating func update(with item: ComposingTextV2.InputElement, index: Int, input: [ComposingTextV2.InputElement]) -> IndexSet {
         var insertedIndexSet = IndexSet()
         // 訂正のない候補を追加
         do {
             let nodeIndex = self.insert(
                 Node(
                     inputElementsRange: .range(index, index + 1),
-                    inputStyle: InputGraphInputStyle(from: input[index].inputStyle).id,
+                    inputStyle: input[index].inputStyle,
                     correction: .none,
-                    value: item.character
+                    value: item.value
                 ),
                 nextTo: self.inputIndexToEndNodeIndices[index, default: IndexSet()]
             )
@@ -123,7 +123,7 @@ struct CorrectGraph {
             guard cInputStyleId.isCompatible(with: inputStyleId) else {
                 continue
             }
-            if let nNode = cNode.find(key: input[cIndex].character) {
+            if let nNode = cNode.find(key: input[cIndex].value) {
                 stack.append((nNode, cIndex - 1, cRouteCount + 1, inputStyleId))
                 for value in nNode.value {
                     if value.isEmpty {
@@ -157,7 +157,7 @@ struct CorrectGraph {
         return insertedIndexSet
     }
 
-    static func build(input: [ComposingText.InputElement]) -> Self {
+    static func build(input: [ComposingTextV2.InputElement]) -> Self {
         var correctGraph = Self()
         for (index, item) in zip(input.indices, input) {
             correctGraph.update(with: item, index: index, input: input)
diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraphTests.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraphTests.swift
index a4f7b30..c61e2d0 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraphTests.swift
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/CorrectGraphTests.swift
@@ -13,7 +13,7 @@ import XCTest
 final class CorrectGraphTests: XCTestCase {
     func testBuildSimpleDirectInput() throws {
         let graph = CorrectGraph.build(input: [
-            .init(character: "あ", inputStyle: .direct)
+            .init(value: "あ", inputStyle: .systemFlickDirect)
         ])
         XCTAssertEqual(
             graph.nodes.first(where: {$0.value == "あ"}),
@@ -22,7 +22,7 @@ final class CorrectGraphTests: XCTestCase {
     }
     func testBuildSimpleDirectInputWithTypo() throws {
         let graph = CorrectGraph.build(input: [
-            .init(character: "か", inputStyle: .direct)
+            .init(value: "か", inputStyle: .systemFlickDirect)
         ])
         XCTAssertEqual(
             graph.nodes.first(where: {$0.value == "か"}),
@@ -35,9 +35,9 @@ final class CorrectGraphTests: XCTestCase {
     }
     func testBuildMultipleDirectInputWithTypo() throws {
         let graph = CorrectGraph.build(input: [
-            .init(character: "あ", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct),
-            .init(character: "う", inputStyle: .direct)
+            .init(value: "あ", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect),
+            .init(value: "う", inputStyle: .systemFlickDirect)
         ])
         XCTAssertEqual(
             graph.nodes.first(where: {$0.value == "か"}),
@@ -59,8 +59,8 @@ final class CorrectGraphTests: XCTestCase {
     }
     func testBuildSimpleRomanInput() throws {
         let graph = CorrectGraph.build(input: [
-            .init(character: "k", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "k", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         XCTAssertEqual(
             graph.nodes.first(where: {$0.value == "k"}),
@@ -73,8 +73,8 @@ final class CorrectGraphTests: XCTestCase {
     }
     func testBuildSimpleRomanInputWithTypo() throws {
         let graph = CorrectGraph.build(input: [
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana)
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana)
         ])
         XCTAssertEqual(
             graph.nodes.first(where: {$0.value == "t" && $0.inputElementsRange == .range(0, 1)}),
diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift
index 9d5335d..81dd579 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift
@@ -13,18 +13,18 @@ import XCTest
 final class InputGraphTests: XCTestCase {
     func testBuildSimpleDirectInput() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "あ", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct),
-            .init(character: "う", inputStyle: .direct)
+            .init(value: "あ", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect),
+            .init(value: "う", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(inputGraph.nodes.count, 4) // Root nodes
     }
     func testBuildSimpleDirectInput_あかう() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "あ", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct),
-            .init(character: "う", inputStyle: .direct)
+            .init(value: "あ", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect),
+            .init(value: "う", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(inputGraph.nodes.count, 5) // Root nodes
@@ -32,9 +32,9 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildSimpleDirectInput_たいか() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "た", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct)
+            .init(value: "た", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -49,7 +49,7 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildSimpleRoman2KanaInput_1文字だけ() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "i", inputStyle: .roman2kana)
+            .init(value: "i", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -59,8 +59,8 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_2文字_it() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana)
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -74,9 +74,9 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_3文字_ita() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -90,10 +90,10 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_4文字_sits() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana)
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -111,9 +111,9 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_3文字_its() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana)
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -139,10 +139,10 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_4文字_itsa() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -183,13 +183,13 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildSimpleRoman2KanaInput_7文字_youshou() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "y", inputStyle: .roman2kana),
-            .init(character: "o", inputStyle: .roman2kana),
-            .init(character: "u", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "h", inputStyle: .roman2kana),
-            .init(character: "o", inputStyle: .roman2kana),
-            .init(character: "u", inputStyle: .roman2kana)
+            .init(value: "y", inputStyle: .systemRomanKana),
+            .init(value: "o", inputStyle: .systemRomanKana),
+            .init(value: "u", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "h", inputStyle: .systemRomanKana),
+            .init(value: "o", inputStyle: .systemRomanKana),
+            .init(value: "u", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -217,8 +217,8 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildSimpleRoman2KanaInput_2文字_tt() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana)
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -240,9 +240,9 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_3文字_tta() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -258,9 +258,9 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_3文字_nta() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "n", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "n", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -274,10 +274,10 @@ final class InputGraphTests: XCTestCase {
     }
     func testBuildSimpleRoman2KanaInput_4文字_itta() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -296,11 +296,11 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildSimpleRoman2KanaInput_5文字_sitsi() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana)
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -320,9 +320,9 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildSimpleRoman2KanaInput_3文字_tts() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana)
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
@@ -346,10 +346,10 @@ final class InputGraphTests: XCTestCase {
     func testBuildSimpleRoman2KanaInput_4文字_tysa() throws {
         // ちゃあ/tyさ
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "y", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana)
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "y", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana)
         ])
         // cleanで壊れる
         let inputGraph = InputGraph.build(input: correctGraph).clean()
@@ -381,8 +381,8 @@ final class InputGraphTests: XCTestCase {
 
     func testBuildMixedInput_2文字_ts() throws {
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .direct)
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph).clean()
         XCTAssertEqual(
diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/LookupGraphTests.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/LookupGraphTests.swift
index 4b74eb8..b21c000 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/LookupGraphTests.swift
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/LookupGraphTests.swift
@@ -27,9 +27,9 @@ final class LookupGraphTests: XCTestCase {
             return
         }
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "し", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct)
+            .init(value: "し", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph)
         var lookupGraph = LookupGraph.build(input: inputGraph, character2CharId: values.character2CharId)
@@ -68,9 +68,9 @@ final class LookupGraphTests: XCTestCase {
             return
         }
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "み", inputStyle: .direct),
-            .init(character: "ら", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct)
+            .init(value: "み", inputStyle: .systemFlickDirect),
+            .init(value: "ら", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph)
         var lookupGraph = LookupGraph.build(input: inputGraph, character2CharId: values.character2CharId)
@@ -100,10 +100,10 @@ final class LookupGraphTests: XCTestCase {
             return
         }
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "た", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct),
-            .init(character: "く", inputStyle: .direct)
+            .init(value: "た", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect),
+            .init(value: "く", inputStyle: .systemFlickDirect)
         ])
         let inputGraph = InputGraph.build(input: correctGraph)
         var lookupGraph = LookupGraph.build(input: inputGraph, character2CharId: values.character2CharId)
@@ -140,12 +140,12 @@ final class LookupGraphTests: XCTestCase {
         }
         // 「しっ」の候補が存在するかどうかを確認
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "a", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana)
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "a", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph)
         var lookupGraph = LookupGraph.build(input: inputGraph, character2CharId: values.character2CharId)
@@ -178,11 +178,11 @@ final class LookupGraphTests: XCTestCase {
         }
         // ts -> ta
         let correctGraph = CorrectGraph.build(input: [
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana),
-            .init(character: "t", inputStyle: .roman2kana),
-            .init(character: "s", inputStyle: .roman2kana),
-            .init(character: "i", inputStyle: .roman2kana)
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana),
+            .init(value: "t", inputStyle: .systemRomanKana),
+            .init(value: "s", inputStyle: .systemRomanKana),
+            .init(value: "i", inputStyle: .systemRomanKana)
         ])
         let inputGraph = InputGraph.build(input: correctGraph)
         var lookupGraph = LookupGraph.build(input: inputGraph, character2CharId: values.character2CharId)
@@ -216,9 +216,9 @@ final class LookupGraphTests: XCTestCase {
             return
         }
         let correctGraph1 = CorrectGraph.build(input: [
-            .init(character: "た", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct)
+            .init(value: "た", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect)
         ])
         let inputGraph1 = InputGraph.build(input: correctGraph1)
         var lookupGraph1 = LookupGraph.build(input: inputGraph1, character2CharId: values.character2CharId)
@@ -227,10 +227,10 @@ final class LookupGraphTests: XCTestCase {
         _ = lookupGraph1.byfixNodeIndices(in: louds, startGraphNodeIndex: startNodeIndex1 ?? 0)
 
         let correctGraph2 = CorrectGraph.build(input: [
-            .init(character: "た", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct),
-            .init(character: "く", inputStyle: .direct) // added
+            .init(value: "た", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect),
+            .init(value: "く", inputStyle: .systemFlickDirect) // added
         ])
         let inputGraph2 = InputGraph.build(input: correctGraph2)
         var lookupGraph2 = LookupGraph.build(input: inputGraph2, character2CharId: values.character2CharId)
@@ -267,9 +267,9 @@ final class LookupGraphTests: XCTestCase {
             return
         }
         let correctGraph1 = CorrectGraph.build(input: [
-            .init(character: "た", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct),
-            .init(character: "か", inputStyle: .direct)
+            .init(value: "た", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect),
+            .init(value: "か", inputStyle: .systemFlickDirect)
         ])
         let inputGraph1 = InputGraph.build(input: correctGraph1)
         var lookupGraph1 = LookupGraph.build(input: inputGraph1, character2CharId: values.character2CharId)
@@ -278,8 +278,8 @@ final class LookupGraphTests: XCTestCase {
         _ = lookupGraph1.byfixNodeIndices(in: louds, startGraphNodeIndex: startNodeIndex1 ?? 0)
 
         let correctGraph2 = CorrectGraph.build(input: [
-            .init(character: "た", inputStyle: .direct),
-            .init(character: "い", inputStyle: .direct)
+            .init(value: "た", inputStyle: .systemFlickDirect),
+            .init(value: "い", inputStyle: .systemFlickDirect)
         ])
         let inputGraph2 = InputGraph.build(input: correctGraph2)
         var lookupGraph2 = LookupGraph.build(input: inputGraph2, character2CharId: values.character2CharId)
diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift
index 8fac13f..ee0363f 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift	
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift	
@@ -18,7 +18,7 @@ extension Kana2Kanji {
         var lookupGraph: LookupGraph
         var convertGraph: ConvertGraph
     }
-    func _experimental_all(_ inputData: ComposingText, option: ConvertRequestOptions) -> Result {
+    func _experimental_all(_ inputData: ComposingTextV2, option: ConvertRequestOptions) -> Result {
         // グラフ構築
         print(#file, "start")
         let correctGraph = CorrectGraph.build(input: inputData.input)
@@ -32,7 +32,7 @@ extension Kana2Kanji {
     }
 
     func _experimental_additional(
-        composingText: ComposingText,
+        composingText: ComposingTextV2,
         additionalInputsStartIndex: Int,
         previousResult: consuming Result,
         option: ConvertRequestOptions
@@ -43,9 +43,27 @@ extension Kana2Kanji {
         for i in additionalInputsStartIndex ..< composingText.input.endIndex {
             insertedIndexSet.formUnion(previousResult.correctGraph.update(with: composingText.input[i], index: i, input: composingText.input))
         }
-        // FIXME: inputGraphの差分ベースの構築は困難なため、普通に構築し直す
+        // MARK: inputGraphの差分ベースの構築は困難なため、普通に構築し直す
         let inputGraph = InputGraph.build(input: previousResult.correctGraph)
-        // 辞書ルックアップによりconvertGraphを構築
+        // MARK: ここは差分ベース
+        print(#file, "lookup", previousResult.inputGraph)
+        var (lookupGraph, convertGraph, matchInfo) = self.dicdataStore.buildConvertGraphDifferential(inputGraph: inputGraph, cacheLookupGraph: previousResult.lookupGraph, option: option)
+        print(#file, "convert")
+        let result = convertGraph.convertAllDifferential(cacheConvertGraph: previousResult.convertGraph, option: option, dicdataStore: self.dicdataStore, lookupGraphMatchInfo: matchInfo)
+        return Result(endNode: result, correctGraph: previousResult.correctGraph, inputGraph: inputGraph, lookupGraph: lookupGraph, convertGraph: convertGraph)
+    }
+
+    func _experimental_delete(
+        composingText: ComposingTextV2,
+        previousResult: consuming Result,
+        option: ConvertRequestOptions
+    ) -> Result {
+        // グラフ構築
+        print(#file, "start")
+        // MARK: この部分の差分ベースの構築は困難なため、普通に構築し直す
+        let correctGraph = CorrectGraph.build(input: composingText.input)
+        let inputGraph = InputGraph.build(input: correctGraph)
+        // MARK: ここから差分ベースにする
         print(#file, "lookup", previousResult.inputGraph)
         var (lookupGraph, convertGraph, matchInfo) = self.dicdataStore.buildConvertGraphDifferential(inputGraph: inputGraph, cacheLookupGraph: previousResult.lookupGraph, option: option)
         print(#file, "convert")
@@ -77,8 +95,8 @@ final class ExperimentalConversionTests: XCTestCase {
 
     func testBuildConvertGraph_たいかく() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
-        var c = ComposingText()
-        c.insertAtCursorPosition("たいかく", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("たいかく", inputStyle: .systemFlickDirect)
         let correctGraph = CorrectGraph.build(input: c.input)
         let inputGraph = InputGraph.build(input: consume correctGraph)
         let (_, convertGraph) = dicdataStore.buildConvertGraph(inputGraph: inputGraph, option: requestOptions())
@@ -94,8 +112,8 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_たい() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("たい", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("たい", inputStyle: .systemFlickDirect)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("タイ")) // たい
         XCTAssertTrue(result.endNode.joinedPrevs().contains("台")) // たい
@@ -104,8 +122,8 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_いか() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("いか", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("いか", inputStyle: .systemFlickDirect)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("以下")) // いか
         XCTAssertTrue(result.endNode.joinedPrevs().contains("伊賀")) // いが
@@ -114,8 +132,8 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_かかく() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("かかく", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("かかく", inputStyle: .systemFlickDirect)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("価格")) // かかく
         XCTAssertTrue(result.endNode.joinedPrevs().contains("科学")) // かがく
@@ -126,8 +144,8 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_たいか() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("たいか", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("たいか", inputStyle: .systemFlickDirect)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("対価")) // たいか
         XCTAssertTrue(result.endNode.joinedPrevs().contains("大河")) // たいが
@@ -136,8 +154,8 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_たいかく() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("たいかく", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("たいかく", inputStyle: .systemFlickDirect)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("体格")) // たいかく
         XCTAssertTrue(result.endNode.joinedPrevs().contains("退学")) // たいがく
@@ -146,16 +164,16 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_むらさき() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("むらさき", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("むらさき", inputStyle: .systemFlickDirect)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("紫")) // むらさき
     }
 
     func testBuildConvertGraph_youshouki() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
-        var c = ComposingText()
-        c.insertAtCursorPosition("youshouki", inputStyle: .roman2kana)
+        var c = ComposingTextV2()
+        c.append("youshouki", inputStyle: .systemRomanKana)
         let correctGraph = CorrectGraph.build(input: c.input)
         let inputGraph = InputGraph.build(input: consume correctGraph)
         let (_, convertGraph) = dicdataStore.buildConvertGraph(inputGraph: inputGraph, option: requestOptions())
@@ -171,8 +189,8 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_youshouki() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("youshouki", inputStyle: .roman2kana)
+        var c = ComposingTextV2()
+        c.append("youshouki", inputStyle: .systemRomanKana)
         let result = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(result.endNode.joinedPrevs().contains("幼少期")) // ようしょうき
     }
@@ -181,14 +199,14 @@ final class ExperimentalConversionTests: XCTestCase {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("みらいえいが", inputStyle: .direct)
+            var c = ComposingTextV2()
+            c.append("みらいえいが", inputStyle: .systemFlickDirect)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("未来映画"))
         }
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("miraieiga", inputStyle: .roman2kana)
+            var c = ComposingTextV2()
+            c.append("miraieiga", inputStyle: .systemRomanKana)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("未来映画"))
         }
@@ -198,32 +216,32 @@ final class ExperimentalConversionTests: XCTestCase {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("sitta", inputStyle: .roman2kana)
+            var c = ComposingTextV2()
+            c.append("sitta", inputStyle: .systemRomanKana)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("知った"))
         }
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("unda", inputStyle: .roman2kana)
+            var c = ComposingTextV2()
+            c.append("unda", inputStyle: .systemRomanKana)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("産んだ"))
         }
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("ixtsuta", inputStyle: .roman2kana)
+            var c = ComposingTextV2()
+            c.append("ixtsuta", inputStyle: .systemRomanKana)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("言った"))
         }
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("its", inputStyle: .roman2kana)
+            var c = ComposingTextV2()
+            c.append("its", inputStyle: .systemRomanKana)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("いた"))
         }
         do {
-            var c = ComposingText()
-            c.insertAtCursorPosition("itsi", inputStyle: .roman2kana)
+            var c = ComposingTextV2()
+            c.append("itsi", inputStyle: .systemRomanKana)
             let result = kana2kanji._experimental_all(c, option: requestOptions())
             XCTAssertTrue(result.endNode.joinedPrevs().contains("痛い"))
         }
@@ -232,12 +250,12 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_incremental_たい() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("たい", inputStyle: .direct)
+        var c = ComposingTextV2()
+        c.append("たい", inputStyle: .systemFlickDirect)
         let firstResult = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(firstResult.endNode.joinedPrevs().contains("タイ")) // たい
         XCTAssertTrue(firstResult.endNode.joinedPrevs().contains("台")) // たい
-        c.insertAtCursorPosition("こ", inputStyle: .direct)
+        c.append("こ", inputStyle: .systemFlickDirect)
         let secondResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 2,
@@ -246,7 +264,7 @@ final class ExperimentalConversionTests: XCTestCase {
         )
         XCTAssertTrue(secondResult.endNode.joinedPrevs().contains("太鼓")) // たいこ
         XCTAssertTrue(secondResult.endNode.joinedPrevs().contains("太古")) // たいこ
-        c.insertAtCursorPosition("く", inputStyle: .direct)
+        c.append("く", inputStyle: .systemFlickDirect)
         let thirdResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 3,
@@ -254,16 +272,25 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         XCTAssertTrue(thirdResult.endNode.joinedPrevs().contains("大国")) // たいこく
+        c.removeLast()
+        let forthResult = kana2kanji._experimental_delete(
+            composingText: c,
+            previousResult: thirdResult,
+            option: requestOptions()
+        )
+        XCTAssertTrue(secondResult.endNode.joinedPrevs().contains("太鼓")) // たいこ
+        XCTAssertTrue(secondResult.endNode.joinedPrevs().contains("太古")) // たいこ
+        XCTAssertFalse(forthResult.endNode.joinedPrevs().contains("大国")) // たいこく
     }
 
     func testConversion_incremental_intai() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("i", inputStyle: .roman2kana)
+        var c = ComposingTextV2()
+        c.append("i", inputStyle: .systemRomanKana)
         let firstResult = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(firstResult.endNode.joinedPrevs().contains("胃")) // い
-        c.insertAtCursorPosition("n", inputStyle: .roman2kana)
+        c.append("n", inputStyle: .systemRomanKana)
         let secondResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 1,
@@ -271,7 +298,7 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         print(secondResult.endNode.joinedPrevs())
-        c.insertAtCursorPosition("t", inputStyle: .roman2kana)
+        c.append("t", inputStyle: .systemRomanKana)
         let thirdResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 2,
@@ -279,7 +306,7 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         print(thirdResult.endNode.joinedPrevs())
-        c.insertAtCursorPosition("a", inputStyle: .roman2kana)
+        c.append("a", inputStyle: .systemRomanKana)
         let forthResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 3,
@@ -287,7 +314,7 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         XCTAssertTrue(forthResult.endNode.joinedPrevs().contains("インタ")) // インタ
-        c.insertAtCursorPosition("i", inputStyle: .roman2kana)
+        c.append("i", inputStyle: .systemRomanKana)
         let fifthResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 4,
@@ -300,11 +327,11 @@ final class ExperimentalConversionTests: XCTestCase {
     func testConversion_incremental_intsi() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
-        var c = ComposingText()
-        c.insertAtCursorPosition("i", inputStyle: .roman2kana)
+        var c = ComposingTextV2()
+        c.append("i", inputStyle: .systemRomanKana)
         let firstResult = kana2kanji._experimental_all(c, option: requestOptions())
         XCTAssertTrue(firstResult.endNode.joinedPrevs().contains("胃")) // い
-        c.insertAtCursorPosition("n", inputStyle: .roman2kana)
+        c.append("n", inputStyle: .systemRomanKana)
         let secondResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 1,
@@ -312,7 +339,7 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         //        XCTAssertTrue(secondResult.endNode.joinedPrevs().contains("胃n")) // in
-        c.insertAtCursorPosition("t", inputStyle: .roman2kana)
+        c.append("t", inputStyle: .systemRomanKana)
         let thirdResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 2,
@@ -320,7 +347,7 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         //        XCTAssertTrue(thirdResult.endNode.joinedPrevs().contains("インt")) // int
-        c.insertAtCursorPosition("s", inputStyle: .roman2kana)
+        c.append("s", inputStyle: .systemRomanKana)
         let forthResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 3,
@@ -328,7 +355,7 @@ final class ExperimentalConversionTests: XCTestCase {
             option: requestOptions()
         )
         XCTAssertTrue(forthResult.endNode.joinedPrevs().contains("インタ")) // インタ
-        c.insertAtCursorPosition("i", inputStyle: .roman2kana)
+        c.append("i", inputStyle: .systemRomanKana)
         let fifthResult = kana2kanji._experimental_additional(
             composingText: c,
             additionalInputsStartIndex: 4,