add it to the intl thing

build/bundle.js

@@ -10155,6 +10155,9 @@ var IntlHelperBar = HelperBar.extend({
     return [{
       text: 'Git Branching',
       id: 'english'
+    }, {
+      text: '日本語版リポジトリ',
+      id: 'japanese'
     }, {
       text: 'Git 브랜치 배우기',
       id: 'korean'
@@ -10170,6 +10173,11 @@ var IntlHelperBar = HelperBar.extend({
     }];
   },
 
+  onJapaneseClick: function() {
+    this.fireCommand('locale ja; levels');
+    this.hide();
+  },
+
   onEnglishClick: function() {
     this.fireCommand('locale en_US; levels');
     this.hide();
@@ -29000,6 +29008,9 @@ var IntlHelperBar = HelperBar.extend({
     return [{
       text: 'Git Branching',
       id: 'english'
+    }, {
+      text: '日本語版リポジトリ',
+      id: 'japanese'
     }, {
       text: 'Git 브랜치 배우기',
       id: 'korean'
@@ -29015,6 +29026,11 @@ var IntlHelperBar = HelperBar.extend({
     }];
   },
 
+  onJapaneseClick: function() {
+    this.fireCommand('locale ja; levels');
+    this.hide();
+  },
+
   onEnglishClick: function() {
     this.fireCommand('locale en_US; levels');
     this.hide();

index.html

@@ -426,7 +426,7 @@
        For a much easier time perusing the source, see the individual files at:
           https://github.com/pcottle/learnGitBranching
   -->
-  <script src="build/bundle.min.0f8af3f2.js"></script>
+  <script src="build/bundle.min.f86c1b8d.js"></script>
 
   <!-- The advantage of github pages: super-easy, simple, slick static hostic.
        The downside? No raw logs to parse for analytics, so I have to include

src/js/views/index.js

@@ -643,6 +643,9 @@ var IntlHelperBar = HelperBar.extend({
     return [{
       text: 'Git Branching',
       id: 'english'
+    }, {
+      text: '日本語版リポジトリ',
+      id: 'japanese'
     }, {
       text: 'Git 브랜치 배우기',
       id: 'korean'
@@ -658,6 +661,11 @@ var IntlHelperBar = HelperBar.extend({
     }];
   },
 
+  onJapaneseClick: function() {
+    this.fireCommand('locale ja; levels');
+    this.hide();
+  },
+
   onEnglishClick: function() {
     this.fireCommand('locale en_US; levels');
     this.hide();