diff --git a/lib/generated/intl/messages_all.dart b/lib/generated/intl/messages_all.dart
index d93832d20..d75407cb6 100644
--- a/lib/generated/intl/messages_all.dart
+++ b/lib/generated/intl/messages_all.dart
@@ -23,6 +23,7 @@ import 'messages_fa.dart' as messages_fa;
 import 'messages_fr.dart' as messages_fr;
 import 'messages_hi.dart' as messages_hi;
 import 'messages_it.dart' as messages_it;
+import 'messages_ja.dart' as messages_ja;
 import 'messages_ko.dart' as messages_ko;
 import 'messages_ms.dart' as messages_ms;
 import 'messages_nl.dart' as messages_nl;
@@ -42,6 +43,7 @@ Map<String, LibraryLoader> _deferredLibraries = {
   'fr': () => new Future.value(null),
   'hi': () => new Future.value(null),
   'it': () => new Future.value(null),
+  'ja': () => new Future.value(null),
   'ko': () => new Future.value(null),
   'ms': () => new Future.value(null),
   'nl': () => new Future.value(null),
@@ -70,6 +72,8 @@ MessageLookupByLibrary? _findExact(String localeName) {
       return messages_hi.messages;
     case 'it':
       return messages_it.messages;
+    case 'ja':
+      return messages_ja.messages;
     case 'ko':
       return messages_ko.messages;
     case 'ms':
diff --git a/lib/generated/intl/messages_ja.dart b/lib/generated/intl/messages_ja.dart
new file mode 100644
index 000000000..7a6b07d60
--- /dev/null
+++ b/lib/generated/intl/messages_ja.dart
@@ -0,0 +1,63 @@
+// DO NOT EDIT. This is code generated via package:intl/generate_localized.dart
+// This is a library that provides messages for a ja locale. All the
+// messages from the main program should be duplicated here with the same
+// function name.
+
+// Ignore issues from commonly used lints in this file.
+// ignore_for_file:unnecessary_brace_in_string_interps, unnecessary_new
+// ignore_for_file:prefer_single_quotes,comment_references, directives_ordering
+// ignore_for_file:annotate_overrides,prefer_generic_function_type_aliases
+// ignore_for_file:unused_import, file_names, avoid_escaping_inner_quotes
+// ignore_for_file:unnecessary_string_interpolations, unnecessary_string_escapes
+
+import 'package:intl/intl.dart';
+import 'package:intl/message_lookup_by_library.dart';
+
+final messages = new MessageLookup();
+
+typedef String MessageIfAbsent(String messageStr, List<dynamic> args);
+
+class MessageLookup extends MessageLookupByLibrary {
+  String get localeName => 'ja';
+
+  final messages = _notInlinedMessages(_notInlinedMessages);
+  static Map<String, Function> _notInlinedMessages(_) => <String, Function>{
+        "am": MessageLookupByLibrary.simpleMessage("午前"),
+        "backButtonTooltip": MessageLookupByLibrary.simpleMessage("戻る"),
+        "clickToSearch": MessageLookupByLibrary.simpleMessage("クリックして検索"),
+        "closeButtonLabel": MessageLookupByLibrary.simpleMessage("閉じる"),
+        "closeNavigationTooltip":
+            MessageLookupByLibrary.simpleMessage("メニューを閉じる"),
+        "closeTabLabelSuffix": MessageLookupByLibrary.simpleMessage("タブを閉じる"),
+        "closeWindowTooltip": MessageLookupByLibrary.simpleMessage("閉じる"),
+        "copyActionLabel": MessageLookupByLibrary.simpleMessage("コピー"),
+        "copyActionTooltip":
+            MessageLookupByLibrary.simpleMessage("選択した内容をクリップボードにコピー"),
+        "cutActionLabel": MessageLookupByLibrary.simpleMessage("切り取り"),
+        "cutActionTooltip":
+            MessageLookupByLibrary.simpleMessage("選択した内容を切り取ってクリップボードに追加"),
+        "day": MessageLookupByLibrary.simpleMessage("日"),
+        "dialogLabel": MessageLookupByLibrary.simpleMessage("ダイアログ"),
+        "hour": MessageLookupByLibrary.simpleMessage("時"),
+        "minimizeWindowTooltip": MessageLookupByLibrary.simpleMessage("最小化"),
+        "minute": MessageLookupByLibrary.simpleMessage("分"),
+        "modalBarrierDismissLabel": MessageLookupByLibrary.simpleMessage("閉じる"),
+        "month": MessageLookupByLibrary.simpleMessage("月"),
+        "newTabLabel": MessageLookupByLibrary.simpleMessage("新しいタブを追加"),
+        "noResultsFoundLabel":
+            MessageLookupByLibrary.simpleMessage("検索結果はありません"),
+        "openNavigationTooltip":
+            MessageLookupByLibrary.simpleMessage("メニューを開く"),
+        "pasteActionLabel": MessageLookupByLibrary.simpleMessage("貼り付け"),
+        "pasteActionTooltip":
+            MessageLookupByLibrary.simpleMessage("クリップボードの内容をここに貼り付け"),
+        "pm": MessageLookupByLibrary.simpleMessage("午後"),
+        "restoreWindowTooltip": MessageLookupByLibrary.simpleMessage("元に戻す"),
+        "scrollTabBackwardLabel": MessageLookupByLibrary.simpleMessage("前のタブへ"),
+        "scrollTabForwardLabel": MessageLookupByLibrary.simpleMessage("次のタブへ"),
+        "searchLabel": MessageLookupByLibrary.simpleMessage("検索"),
+        "selectAllActionLabel": MessageLookupByLibrary.simpleMessage("全て選択"),
+        "selectAllActionTooltip": MessageLookupByLibrary.simpleMessage("全て選択"),
+        "year": MessageLookupByLibrary.simpleMessage("年")
+      };
+}
diff --git a/lib/generated/l10n.dart b/lib/generated/l10n.dart
index cf5af9979..7d21544f5 100644
--- a/lib/generated/l10n.dart
+++ b/lib/generated/l10n.dart
@@ -304,6 +304,7 @@ class AppLocalizationDelegate extends LocalizationsDelegate<S> {
       Locale.fromSubtags(languageCode: 'fr'),
       Locale.fromSubtags(languageCode: 'hi'),
       Locale.fromSubtags(languageCode: 'it'),
+      Locale.fromSubtags(languageCode: 'ja'),
       Locale.fromSubtags(languageCode: 'ko'),
       Locale.fromSubtags(languageCode: 'ms'),
       Locale.fromSubtags(languageCode: 'nl'),
diff --git a/lib/l10n/intl_ja.arb b/lib/l10n/intl_ja.arb
new file mode 100644
index 000000000..25fce0601
--- /dev/null
+++ b/lib/l10n/intl_ja.arb
@@ -0,0 +1,34 @@
+{
+  "@@locale": "ja",
+  "backButtonTooltip": "戻る",
+  "closeButtonLabel": "閉じる",
+  "searchLabel": "検索",
+  "closeNavigationTooltip": "メニューを閉じる",
+  "openNavigationTooltip": "メニューを開く",
+  "clickToSearch": "クリックして検索",
+  "modalBarrierDismissLabel": "閉じる",
+  "minimizeWindowTooltip": "最小化",
+  "restoreWindowTooltip": "元に戻す",
+  "closeWindowTooltip": "閉じる",
+  "dialogLabel": "ダイアログ",
+  "cutActionLabel": "切り取り",
+  "copyActionLabel": "コピー",
+  "pasteActionLabel": "貼り付け",
+  "selectAllActionLabel": "全て選択",
+  "newTabLabel": "新しいタブを追加",
+  "closeTabLabelSuffix": "タブを閉じる",
+  "scrollTabBackwardLabel": "前のタブへ",
+  "scrollTabForwardLabel": "次のタブへ",
+  "noResultsFoundLabel": "検索結果はありません",
+  "copyActionTooltip": "選択した内容をクリップボードにコピー",
+  "cutActionTooltip": "選択した内容を切り取ってクリップボードに追加",
+  "pasteActionTooltip": "クリップボードの内容をここに貼り付け",
+  "selectAllActionTooltip": "全て選択",
+  "hour": "時",
+  "minute": "分",
+  "am": "午前",
+  "pm": "午後",
+  "month": "月",
+  "day": "日",
+  "year": "年"
+}
diff --git a/lib/src/localization.dart b/lib/src/localization.dart
index 9b7979f4a..8fecfc1a2 100644
--- a/lib/src/localization.dart
+++ b/lib/src/localization.dart
@@ -137,6 +137,7 @@ const List<Locale> defaultSupportedLocales = <Locale>[
   Locale('fr'),
   Locale('hi'),
   Locale('it'),
+  Locale('ja'),
   Locale('ko'),
   Locale('ms'),
   Locale('nl'),