diff --git a/l10n/ja.js b/l10n/ja.js
new file mode 100644
index 0000000..a15af42
--- /dev/null
+++ b/l10n/ja.js
@@ -0,0 +1,24 @@
+OC.L10N.register(
+    "weather",
+    {
+    "Weather" : "天気",
+    "OpenWeatherMap API Key" : "OpenWeatherMap API キー",
+    "Save" : "保存",
+    "Add a city" : "都市を追加",
+    "Add city" : "都市を追加",
+    "City name" : "都市名",
+    "Add" : "追加",
+    "Cancel" : "キャンセル",
+    "Settings" : "設定",
+    "Metric" : "摂氏",
+    "Click here to get an API key" : "API キーを取得するにはこちらをクリック",
+    "Pressure" : "気圧",
+    "Humidity" : "湿度",
+    "Cloudiness" : "くもり",
+    "Wind" : "風",
+    "Sunrise" : "日の出",
+    "Sunset" : "日の入り",
+    "Hour" : "時",
+    "Temperature" : "気温"
+},
+"nplurals=1; plural=0;");
diff --git a/l10n/ja.json b/l10n/ja.json
new file mode 100644
index 0000000..59ae3b1
--- /dev/null
+++ b/l10n/ja.json
@@ -0,0 +1,22 @@
+{ "translations": {
+    "Weather" : "天気",
+    "OpenWeatherMap API Key" : "OpenWeatherMap API キー",
+    "Save" : "保存",
+    "Add a city" : "都市を追加",
+    "Add city" : "都市を追加",
+    "City name" : "都市名",
+    "Add" : "追加",
+    "Cancel" : "キャンセル",
+    "Settings" : "設定",
+    "Metric" : "摂氏",
+    "Click here to get an API key" : "API キーを取得するにはこちらをクリック",
+    "Pressure" : "気圧",
+    "Humidity" : "湿度",
+    "Cloudiness" : "くもり",
+    "Wind" : "風",
+    "Sunrise" : "日の出",
+    "Sunset" : "日の入り",
+    "Hour" : "時",
+    "Temperature" : "気温"
+},"pluralForm" :"nplurals=1; plural=0;"
+}
\ No newline at end of file