diff --git a/docs/_templates/sidebarintro.html b/docs/_templates/sidebarintro.html
index 28f8249..52c9757 100644
--- a/docs/_templates/sidebarintro.html
+++ b/docs/_templates/sidebarintro.html
@@ -63,6 +63,6 @@
   <li><a href="http://docs.python-guide.org/en/latest/">English</a></li>
   <li><a href="https://python-guide-fr.readthedocs.io/fr/latest/">French</a></li>
   <li><a href="https://pythonguidecn.readthedocs.io/zh/latest/">Chinese</a></li>
-  <li><a href="https://python-guide-ja.readthedocs.io/en/latest/">Japanese</a></li>
+  <li><a href="http://python-guideja.readthedocs.io/ja/latest/">Japanese</a></li>
   <li><a href="https://python-guide-kr.readthedocs.io/ko/latest/">Korean</a></li>
 </ul>
diff --git a/docs/_templates/sidebarlogo.html b/docs/_templates/sidebarlogo.html
index 64db4c4..78f7d70 100644
--- a/docs/_templates/sidebarlogo.html
+++ b/docs/_templates/sidebarlogo.html
@@ -44,6 +44,6 @@
   <li><a href="http://docs.python-guide.org/en/latest/">English</a></li>
   <li><a href="https://python-guide-fr.readthedocs.io/fr/latest/">French</a></li>
   <li><a href="https://pythonguidecn.readthedocs.io/zh/latest/">Chinese</a></li>
-  <li><a href="https://python-guide-ja.readthedocs.io/en/latest/">Japanese</a></li>
+  <li><a href="http://python-guideja.readthedocs.io/ja/latest/">Japanese</a></li>
   <li><a href="https://python-guide-kr.readthedocs.io/ko/latest/">Korean</a></li>
 </ul>