diff --git a/locales/en-US.yml b/locales/en-US.yml
index 6a8227511e..b9017317ed 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -944,6 +944,8 @@ approvalStatus: "Approval Status"
 document: "Documentation"
 numberOfPageCache: "Number of cached pages"
 numberOfPageCacheDescription: "Increasing this number will improve convenience for but cause more load as more memory usage on the user's device."
+numberOfReplies: "Number of replies in a thread"
+numberOfRepliesDescription: "Increasing this number will display more replies. Setting this too high can cause replies to be cramped and unreadable."
 logoutConfirm: "Really log out?"
 lastActiveDate: "Last used at"
 statusbar: "Status bar"
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 98ab44dd41..6181e08b56 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -947,6 +947,8 @@ export interface Locale {
     "document": string;
     "numberOfPageCache": string;
     "numberOfPageCacheDescription": string;
+    "numberOfReplies": string;
+    "numberOfRepliesDescription": string;
     "logoutConfirm": string;
     "lastActiveDate": string;
     "statusbar": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 0af37e041f..6006487a9c 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -944,6 +944,8 @@ approvalStatus: "承認状況"
 document: "ドキュメント"
 numberOfPageCache: "ページキャッシュ数"
 numberOfPageCacheDescription: "多くすると利便性が向上しますが、負荷とメモリ使用量が増えます。"
+numberOfReplies: "スレッド内の返信数"
+numberOfRepliesDescription: "この数値を大きくすると、より多くの返信が表示されます。この値を大きくしすぎると、返信が窮屈になり、読めなくなることがあります。"
 logoutConfirm: "ログアウトしますか？"
 lastActiveDate: "最終利用日時"
 statusbar: "ステータスバー"
diff --git a/packages/frontend/src/components/MkNoteSub.vue b/packages/frontend/src/components/MkNoteSub.vue
index 384a85e546..5b1e1af308 100644
--- a/packages/frontend/src/components/MkNoteSub.vue
+++ b/packages/frontend/src/components/MkNoteSub.vue
@@ -64,7 +64,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</footer>
 		</div>
 	</div>
-	<template v-if="depth < 5">
+	<template v-if="depth < numberOfReplies">
 		<MkNoteSub v-for="reply in replies" :key="reply.id" :note="reply" :class="$style.reply" :detail="true" :depth="depth + 1" :expandAllCws="props.expandAllCws"/>
 	</template>
 	<div v-else :class="$style.more">
@@ -124,6 +124,7 @@ const translation = ref<any>(null);
 const translating = ref(false);
 const isDeleted = ref(false);
 const renoted = ref(false);
+const numberOfReplies = ref(defaultStore.state.numberOfReplies);
 const reactButton = shallowRef<HTMLElement>();
 const renoteButton = shallowRef<HTMLElement>();
 const quoteButton = shallowRef<HTMLElement>();
@@ -390,7 +391,7 @@ function menu(viaKeyboard = false): void {
 if (props.detail) {
 	os.api('notes/children', {
 		noteId: props.note.id,
-		limit: 5,
+		limit: numberOfReplies.value,
 		showQuotes: false,
 	}).then(res => {
 		replies = res;
diff --git a/packages/frontend/src/components/SkNoteSub.vue b/packages/frontend/src/components/SkNoteSub.vue
index 64c71efd4e..dd4abe8f58 100644
--- a/packages/frontend/src/components/SkNoteSub.vue
+++ b/packages/frontend/src/components/SkNoteSub.vue
@@ -72,7 +72,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</footer>
 		</div>
 	</div>
-	<template v-if="depth < 5">
+	<template v-if="depth < numberOfReplies">
 		<SkNoteSub v-for="reply in replies" :key="reply.id" :note="reply" :class="[$style.reply, { [$style.single]: replies.length === 1 }]" :detail="true" :depth="depth + 1" :expandAllCws="props.expandAllCws"/>
 	</template>
 	<div v-else :class="$style.more">
@@ -133,6 +133,7 @@ const translation = ref<any>(null);
 const translating = ref(false);
 const isDeleted = ref(false);
 const renoted = ref(false);
+const numberOfReplies = ref(defaultStore.state.numberOfReplies);
 const reactButton = shallowRef<HTMLElement>();
 const renoteButton = shallowRef<HTMLElement>();
 const quoteButton = shallowRef<HTMLElement>();
@@ -399,7 +400,7 @@ function menu(viaKeyboard = false): void {
 if (props.detail) {
 	os.api('notes/children', {
 		noteId: props.note.id,
-		limit: 5,
+		limit: numberOfReplies.value,
 		showQuotes: false,
 	}).then(res => {
 		replies = res;
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index 38a1b5c2a7..419ea13713 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -89,6 +89,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<option value="1_1">{{ i18n.t('limitTo', { x: '1:1' }) }}</option>
 				<option value="2_3">{{ i18n.t('limitTo', { x: '2:3' }) }}</option>
 			</MkRadios>
+
+			<MkRange v-model="numberOfReplies" :min="2" :max="20" :step="1" easing>
+				<template #label>{{ i18n.ts.numberOfReplies }}</template>
+				<template #caption>{{ i18n.ts.numberOfRepliesDescription }}</template>
+			</MkRange>
 		</div>
 	</FormSection>
 
@@ -268,6 +273,7 @@ const nsfw = computed(defaultStore.makeGetterSetter('nsfw'));
 const showFixedPostForm = computed(defaultStore.makeGetterSetter('showFixedPostForm'));
 const showFixedPostFormInChannel = computed(defaultStore.makeGetterSetter('showFixedPostFormInChannel'));
 const numberOfPageCache = computed(defaultStore.makeGetterSetter('numberOfPageCache'));
+const numberOfReplies = computed(defaultStore.makeGetterSetter('numberOfReplies'));
 const instanceTicker = computed(defaultStore.makeGetterSetter('instanceTicker'));
 const enableInfiniteScroll = computed(defaultStore.makeGetterSetter('enableInfiniteScroll'));
 const useReactionPickerForContextMenu = computed(defaultStore.makeGetterSetter('useReactionPickerForContextMenu'));
diff --git a/packages/frontend/src/pages/settings/preferences-backups.vue b/packages/frontend/src/pages/settings/preferences-backups.vue
index 3f038f8293..f7768ebe5c 100644
--- a/packages/frontend/src/pages/settings/preferences-backups.vue
+++ b/packages/frontend/src/pages/settings/preferences-backups.vue
@@ -90,6 +90,7 @@ const defaultStoreSaveKeys: (keyof typeof defaultStore['state'])[] = [
 	'reportError',
 	'squareAvatars',
 	'numberOfPageCache',
+	'numberOfReplies',
 	'aiChanMode',
 	'mediaListWithOneImageAppearance',
 ];
diff --git a/packages/frontend/src/store.ts b/packages/frontend/src/store.ts
index eb16222968..a53336b5f7 100644
--- a/packages/frontend/src/store.ts
+++ b/packages/frontend/src/store.ts
@@ -346,6 +346,10 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: 3,
 	},
+	numberOfReplies: {
+		where: 'device',
+		default: 5,
+	},
 	showNoteActionsOnlyHover: {
 		where: 'device',
 		default: false,