diff --git a/browser/main/Detail/ToggleModeButton.js b/browser/main/Detail/ToggleModeButton.js
index 7c026429..fcbaab34 100644
--- a/browser/main/Detail/ToggleModeButton.js
+++ b/browser/main/Detail/ToggleModeButton.js
@@ -14,7 +14,7 @@ const ToggleModeButton = ({
     <div styleName={editorType === 'EDITOR_PREVIEW' ? 'active' : 'non-active'} onClick={() => onClick('EDITOR_PREVIEW')}>
       <img styleName='item-star' src={editorType === 'EDITOR_PREVIEW' ? '' : '../resources/icon/icon-mode-split-on-active.svg'} />
     </div>
-    <span styleName='tooltip'>{i18n.__('Toggle Mode')}</span>
+    <span lang={i18n.locale} styleName='tooltip'>{i18n.__('Toggle Mode')}</span>
   </div>
 )
 
diff --git a/browser/main/Detail/ToggleModeButton.styl b/browser/main/Detail/ToggleModeButton.styl
index 73f5acbd..2b47b932 100644
--- a/browser/main/Detail/ToggleModeButton.styl
+++ b/browser/main/Detail/ToggleModeButton.styl
@@ -40,6 +40,11 @@
   opacity 0
   transition 0.1s
 
+.tooltip:lang(ja)
+  @extend .tooltip
+  left -8px
+  width 70px
+
 body[data-theme="dark"]
   .control-fullScreenButton
     topBarButtonDark()