diff --git a/browser/main/Detail/FullscreenButton.js b/browser/main/Detail/FullscreenButton.js
index ee212603..3a86a751 100644
--- a/browser/main/Detail/FullscreenButton.js
+++ b/browser/main/Detail/FullscreenButton.js
@@ -11,7 +11,7 @@ const FullscreenButton = ({
 }) => (
   <button styleName='control-fullScreenButton' title={i18n.__('Fullscreen')} onMouseDown={(e) => onClick(e)}>
     <img styleName='iconInfo' src='../resources/icon/icon-full.svg' />
-    <span styleName='tooltip'>{i18n.__('Fullscreen')}({hotkey})</span>
+    <span lang={i18n.locale} styleName='tooltip'>{i18n.__('Fullscreen')}({hotkey})</span>
   </button>
 )
 
diff --git a/browser/main/Detail/FullscreenButton.styl b/browser/main/Detail/FullscreenButton.styl
index cc1a8dff..133577f3 100644
--- a/browser/main/Detail/FullscreenButton.styl
+++ b/browser/main/Detail/FullscreenButton.styl
@@ -17,6 +17,10 @@
   opacity 0
   transition 0.1s
 
+.tooltip:lang(ja)
+  @extend .tooltip
+  right 35px
+
 body[data-theme="dark"]
   .control-fullScreenButton
     topBarButtonDark()
\ No newline at end of file