diff --git a/.github/workflows/deploy_docs.yml b/.github/workflows/deploy_docs.yml
index 87fdd4be..7606057e 100644
--- a/.github/workflows/deploy_docs.yml
+++ b/.github/workflows/deploy_docs.yml
@@ -6,6 +6,7 @@ on:
       - master
       - develop
       - '!gh-pages'
+      - changedocs
     tags: '*'
 
 jobs:
@@ -19,6 +20,7 @@ jobs:
       uses: actions/checkout@v2
       with:
         path: main
+        fetch-depth: 0
 
     - name: Checkout gh-pages
       uses: actions/checkout@v2
@@ -38,6 +40,8 @@ jobs:
         pip install tox tox-gh-actions
 
     - name: Build docs with tox
+      env:
+        TARGET_NAME: ${{ env.GITHUB_REF_SLUG }}
       run: |
         cd main
         tox -e docs
diff --git a/docs/sphinx/manual/_templates/versions.html b/docs/sphinx/manual/_templates/versions.html
new file mode 100644
index 00000000..fb30ded1
--- /dev/null
+++ b/docs/sphinx/manual/_templates/versions.html
@@ -0,0 +1,47 @@
+{# The original version of this file is a part of sphinx_rtd_theme v0.5.0, which is distributed under the MIT license #}
+{# https://github.com/readthedocs/sphinx_rtd_theme #}
+
+{# Add rst-badge after rst-versions for small badge style. #}
+{% if ENABLE_VERSIONING == "true" %}
+<div class="rst-versions" data-toggle="rst-versions" role="note" aria-label="versions">
+  <span class="rst-current-version" data-toggle="rst-current-version">
+    <span class="fa fa-book"> Read the Docs</span>
+    v: {{ current_version }}
+    <span class="fa fa-caret-down"></span>
+  </span>
+  <div class="rst-other-versions">
+    <dl>
+      <dt>{{ _('Languages') }}</dt>
+      {% for lang in languages %}
+        {% set root_dir = pathto("../..", 1)%}
+        <dd>
+        {% if lang == current_lang %}<strong>{% endif %}
+          <a href="{{root_dir}}/{{current_version}}/{{lang}}/{{pathto(pagename, 0, ".")}}">{{ lang }}</a>
+        {% if lang == current_lang %}</strong>{% endif %}
+        </dd>
+      {% endfor %}
+
+      <dt>{{ _('Branches') }}</dt>
+      {% for name in branches %}
+        {% set root_dir = pathto("../..", 1)%}
+        <dd>
+        {% if name == current_version %}<strong>{% endif %}
+          <a href="{{root_dir}}/{{name}}/{{current_lang}}/{{pathto(pagename, 0, ".")}}">{{ name }}</a>
+        {% if name == current_version %}</strong>{% endif %}
+        </dd>
+      {% endfor %}
+
+      <dt>{{ _('Tags') }}</dt>
+      {% for name in tags %}
+        {% set root_dir = pathto("../..", 1)%}
+        <dd>
+        {% if name == current_version %}<strong>{% endif %}
+        <a href="{{root_dir}}/{{name}}/{{current_lang}}/{{pathto(pagename, 0, ".")}}">{{ name }}</a>
+        {% if name == current_version %}</strong>{% endif %}
+        </dd>
+      {% endfor %}
+
+    </dl>
+  </div>
+</div>
+{% endif %} {# endif ENABLE_VERSIONING #}
diff --git a/docs/sphinx/manual/en/source/conf.py b/docs/sphinx/manual/en/source/conf.py
index 1de846ce..2c38cee7 100644
--- a/docs/sphinx/manual/en/source/conf.py
+++ b/docs/sphinx/manual/en/source/conf.py
@@ -22,7 +22,8 @@
 
 import sys
 import os
-sys.path.insert(0, os.path.abspath('../../../../../physbo'))
+
+sys.path.insert(0, os.path.abspath("../../../../../physbo"))
 
 # -- Project information -----------------------------------------------------
 
@@ -40,20 +41,27 @@
 from recommonmark.parser import CommonMarkParser
 
 source_parsers = {
-    '.md': CommonMarkParser,
+    ".md": CommonMarkParser,
 }
 
 from recommonmark.transform import AutoStructify
 
-github_doc_root = 'https://github.com/rtfd/recommonmark/tree/master/doc/'
+github_doc_root = "https://github.com/rtfd/recommonmark/tree/master/doc/"
+
+
 def setup(app):
-    app.add_config_value('recommonmark_config', {
-            'url_resolver': lambda url: github_doc_root + url,
-            'auto_toc_tree_section': 'Contents',
-            }, True)
+    app.add_config_value(
+        "recommonmark_config",
+        {
+            "url_resolver": lambda url: github_doc_root + url,
+            "auto_toc_tree_section": "Contents",
+        },
+        True,
+    )
     app.add_transform(AutoStructify)
 
-pygments_style = 'sphinx'
+
+pygments_style = "sphinx"
 nbsphinx_execute = "never"
 
 # -- General configuration ------------------------------------------------
@@ -81,47 +89,33 @@ def setup(app):
 numfig = True
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["../../_templates"]
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', '**.ipynb_checkpoints']
-for t in ('tag-latex', 'tag-latexpdf', 'tag-latexpdfja'):
+exclude_patterns = ["_build", "**.ipynb_checkpoints"]
+for t in ("tag-latex", "tag-latexpdf", "tag-latexpdfja"):
     if t in tags:
-        exclude_patterns.append('api')
+        exclude_patterns.append("api")
 
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 #
-source_suffix = ['.rst', '.md']
+source_suffix = [".rst", ".md"]
 
 # The master toctree document.
-master_doc = 'index'
-
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-# The short X.Y version.
-version = u'1.0.0'
-# The full version, including alpha/beta/rc tags.
-release = u'1.0.0'
+master_doc = "index"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = 'en'
-
-# List of patterns, relative to source directory, that match files and
-# directories to ignore when looking for source files.
-# This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = []
+language = "en"
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False
@@ -132,47 +126,42 @@ def setup(app):
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'alabaster'
+html_theme = "sphinx_rtd_theme"
 html_log = "logo.png"
-html_theme_options = {
-    'logo_only': True
-}
+html_theme_options = {"logo_only": True}
 
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
 #
-html_theme_options = {
-    'font_family': 'Helvetica',
-    'sidebar_search_button': 'pink_1'
-}
+html_theme_options = {"font_family": "Helvetica", "sidebar_search_button": "pink_1"}
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['../../_static']
+html_static_path = ["../../_static"]
 
 # Custom sidebar templates, must be a dictionary that maps document names
 # to template names.
 #
 # This is required for the alabaster theme
 # refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
-html_sidebars = {
-    '**': [
-        'about.html',
-        'navigation.html',
-        'relations.html',
-        'searchbox.html',
-        'donate.html',
-    ]
-}
+# html_sidebars = {
+#     "**": [
+#         "about.html",
+#         "navigation.html",
+#         "relations.html",
+#         "searchbox.html",
+#         "donate.html",
+#     ]
+# }
 
 
 # -- Options for HTMLHelp output ------------------------------------------
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'PHYSBOdoc'
+htmlhelp_basename = "PHYSBOdoc"
 
 
 # -- Options for LaTeX output ---------------------------------------------
@@ -181,15 +170,12 @@ def setup(app):
     # The paper size ('letterpaper' or 'a4paper').
     #
     # 'papersize': 'letterpaper',
-
     # The font size ('10pt', '11pt' or '12pt').
     #
     # 'pointsize': '10pt',
-
     # Additional stuff for the LaTeX preamble.
     #
     # 'preamble': '',
-
     # Latex figure (float) alignment
     #
     # 'figure_align': 'htbp',
@@ -199,8 +185,14 @@ def setup(app):
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    ('index','PHYSBO_en.tex', u'PHYSBO Documentation',
-     u'PHYSBO\'s team', 'manual', 'True'),
+    (
+        "index",
+        "PHYSBO_en.tex",
+        u"PHYSBO Documentation",
+        u"PHYSBO's team",
+        "manual",
+        "True",
+    ),
 ]
 
 
@@ -208,12 +200,9 @@ def setup(app):
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [
-    (master_doc, 'PHYSBO', u'PHYSBO Documentation',
-     [author], 1)
-]
+man_pages = [(master_doc, "PHYSBO", u"PHYSBO Documentation", [author], 1)]
 
-#latex_docclass =  {'manual': 'jsbook'}
+# latex_docclass =  {'manual': 'jsbook'}
 latex_logo = "../../_static/logo.png"
 
 # -- Options for Texinfo output -------------------------------------------
@@ -222,7 +211,47 @@ def setup(app):
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'PHYSBO', u'PHYSBO Documentation',
-     author, 'PHYSBO', 'One line description of project.',
-     'Miscellaneous'),
+    (
+        master_doc,
+        "PHYSBO",
+        u"PHYSBO Documentation",
+        author,
+        "PHYSBO",
+        "One line description of project.",
+        "Miscellaneous",
+    ),
 ]
+
+# -- configuring _template/version.html -------------------------------------
+
+html_context = {}
+
+html_context["ENABLE_VERSIONING"] = os.environ.get("CI", "false")
+
+html_context["languages"] = [("en"), ("ja")]
+html_context["current_lang"] = language
+
+current_version = os.environ.get("TARGET_NAME", "")
+if not current_version:
+    current_version = release
+html_context["current_version"] = current_version
+
+html_context["branches"] = ["develop", "master"]
+html_context["tags"] = []
+exclude_tags = ["v0.1.0", "v0.2.0", "v0.3.0"]
+
+try:
+    import git
+
+    repo = git.Repo(search_parent_directories=True)
+    tags = list(map(str, repo.tags))
+    tags.sort(reverse=True)
+    for tag in tags:
+        if tag not in exclude_tags:
+            html_context["tags"].append(tag)
+except:
+    pass
+
+if current_version not in html_context["branches"]:
+    if current_version not in html_context["tags"]:
+        html_context["branches"].append(current_version)
diff --git a/docs/sphinx/manual/ja/source/conf.py b/docs/sphinx/manual/ja/source/conf.py
index 3b45821b..9a23ac05 100644
--- a/docs/sphinx/manual/ja/source/conf.py
+++ b/docs/sphinx/manual/ja/source/conf.py
@@ -16,7 +16,8 @@
 
 import sys
 import os
-sys.path.insert(0, os.path.abspath('../../../../../physbo'))
+
+sys.path.insert(0, os.path.abspath("../../../../../physbo"))
 
 # -- Project information -----------------------------------------------------
 
@@ -47,8 +48,10 @@
     "nbsphinx",
 ]
 
+numfig = True
+
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ["_templates"]
+templates_path = ["../../_templates"]
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -60,21 +63,21 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', '**.ipynb_checkpoints']
-for t in ('tag-latex', 'tag-latexpdf', 'tag-latexpdfja'):
+exclude_patterns = ["_build", "**.ipynb_checkpoints"]
+for t in ("tag-latex", "tag-latexpdf", "tag-latexpdfja"):
     if t in tags:
-        exclude_patterns.append('api')
+        exclude_patterns.append("api")
 
 # The suffix of source filenames.
-source_suffix = ['.rst', '.md']
+source_suffix = [".rst", ".md"]
 
 from recommonmark.parser import CommonMarkParser
 
 source_parsers = {
-    '.md': CommonMarkParser,
+    ".md": CommonMarkParser,
 }
 
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 nbsphinx_execute = "never"
 
@@ -86,9 +89,7 @@
 # html_theme = "alabaster"
 html_theme = "sphinx_rtd_theme"
 html_log = "logo.png"
-html_theme_options = {
-    'logo_only': True
-}
+html_theme_options = {"logo_only": True}
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
@@ -100,5 +101,40 @@
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
-latex_docclass =  {'manual': 'jsbook'}
+latex_docclass = {"manual": "jsbook"}
 latex_logo = "../../_static/logo.png"
+
+
+# -- configuring _template/version.html -------------------------------------
+
+html_context = {}
+
+html_context["ENABLE_VERSIONING"] = os.environ.get("CI", "false")
+
+html_context["languages"] = [("en"), ("ja")]
+html_context["current_lang"] = language
+
+current_version = os.environ.get("TARGET_NAME", "")
+if not current_version:
+    current_version = release
+html_context["current_version"] = current_version
+
+html_context["branches"] = ["develop", "master"]
+html_context["tags"] = []
+exclude_tags = ["v0.1.0", "v0.2.0", "v0.3.0"]
+
+try:
+    import git
+
+    repo = git.Repo(search_parent_directories=True)
+    tags = list(map(str, repo.tags))
+    tags.sort(reverse=True)
+    for tag in tags:
+        if tag not in exclude_tags:
+            html_context["tags"].append(tag)
+except:
+    pass
+
+if current_version not in html_context["branches"]:
+    if current_version not in html_context["tags"]:
+        html_context["branches"].append(current_version)
diff --git a/tox.ini b/tox.ini
index 21d0b642..81a5390f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,6 +29,7 @@ deps =
   nbsphinx
   pybtex
 whitelist_externals = rm
+passenv = CI TARGET_NAME
 
 commands = 
   rm -rf docs/sphinx/manual/ja/source/api