diff --git a/src/Resources/Locales/ja_JP.axaml b/src/Resources/Locales/ja_JP.axaml
index ab8c3c7e..46041cb5 100644
--- a/src/Resources/Locales/ja_JP.axaml
+++ b/src/Resources/Locales/ja_JP.axaml
@@ -1,4 +1,7 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <ResourceDictionary.MergedDictionaries>
+    <ResourceInclude Source="avares://SourceGit/Resources/Locales/en_US.axaml"/>
+  </ResourceDictionary.MergedDictionaries>
   <x:String x:Key="Text.About" xml:space="preserve">概要</x:String>
   <x:String x:Key="Text.About.Menu" xml:space="preserve">SourceGitについて</x:String>
   <x:String x:Key="Text.About.BuildWith" xml:space="preserve">• Build with </x:String>