diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 96ee09d3..c55954a8 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -159,42 +159,42 @@
     <string name="insert_into_db_error">
         データをデータベースに書き込む際にエラーが発生しました。
     </string>
-    <string name="action_manage">Manage locations</string>
-    <string name="add_widget">Add widget</string>
+    <string name="action_manage">ロケーションの管理</string>
+    <string name="add_widget">ウィジェットの追加</string>
     <string name="appwidget_text">PFA - Weather</string>
     <string name="card_day_heading">Course of the day</string>
-    <string name="card_error_content">Please try to update!</string>
-    <string name="action_refresh">Refresh</string>
-    <string name="card_error_heading">Error fetching weather data</string>
-    <string name="card_sun_heading">Sun</string>
-    <string name="card_week_heading">Week</string>
-    <string name="configure">Configure</string>
-    <string name="error_add_city">Error while adding City, please try again!</string>
-    <string name="error_fetch_cityList">Error while updating Citylist, please try again!</string>
-    <string name="error_fetch_forecast">Error while updating Forecast, please try again!</string>
-    <string name="error_no_internet">Your Device is not connected to the internet!</string>
+    <string name="card_error_content">アップデートをお試しください!</string>
+    <string name="action_refresh">再取得</string>
+    <string name="card_error_heading">天気データーの所得エラーです</string>
+    <string name="card_sun_heading">晴れ</string>
+    <string name="card_week_heading">週</string>
+    <string name="configure">設定</string>
+    <string name="error_add_city">都市の追加時にエラーが発生しました!もう一度やり直してください。</string>
+    <string name="error_fetch_cityList">都市リストの更新時にエラーが発生しました!もう一度やり直してください。</string>
+    <string name="error_fetch_forecast">予報更新時にエラーが発生しました!もう一度やり直してください。</string>
+    <string name="error_no_internet">あなたのデバイスはインターネットに接続されていません!</string>
     <string name="error_radius_search">Error while doing radius search, please try again!</string>
     <string name="help_privacy_answer">Privacy Friendly Weather uses the permission \"Internet\\ to retrieve weather data. It further does not include any tracking mechanisms or advertisement. The two permissions for binding service jobs and keeping the phone awake are needed for background data management of the app.</string>
-    <string name="help_whatis">What is Privacy Friendly Weather?</string>
-    <string name="help_whatis_answer">Privacy Friendly Weather is an App to check the current Weather and Forecasts for your Locations.</string>
-    <string name="help_where_from">Where do the weather informations come from?</string>
-    <string name="help_where_from_answer">The information is fetched from the service OpenWeatherMap. If you have your own OpenWeatherMap Key, go to the settings to register it.</string>
-    <string name="next">Next</string>
-    <string name="okay">Okay</string>
-    <string name="reset">reset</string>
-    <string name="settings_API_key_default">No API Key provided</string>
-    <string name="settings_confirm_content_API_key_reset">Do you really want to reset to the default API key?</string>
-    <string name="settings_confirm_title_API_key_reset">Reset API key</string>
+    <string name="help_whatis">Privacy Friendlyとは?</string>
+    <string name="help_whatis_answer">Privacy Friendly Weatherはあなたの住んでいる地域の現在の天気と予報を確認できるアプリです。</string>
+    <string name="help_where_from">天気情報はどこから来ますか?</string>
+    <string name="help_where_from_answer">OpenWeatherMapというサービスから情報を取得しています。独自のOpenWeatherMapキーをお持ちでしたら設定画面で登録してください。</string>
+    <string name="next">次</string>
+    <string name="okay">Ok</string>
+    <string name="reset">リセット</string>
+    <string name="settings_API_key_default">APIキーが提供されていません。</string>
+    <string name="settings_confirm_content_API_key_reset">本当にデフォルトのAPIキーにリセットしますか?</string>
+    <string name="settings_confirm_title_API_key_reset">APIキーをリセット</string>
     <string name="settings_description_API">Privacy Friendly Weather receives data from the free service of openweathermap.org. This service is limited to 1000 calls per day. You could register your own API key for free to get your own 1000 calls. Otherwise, calls are shared between all users of Privacy Friendly Weather.</string>
     <string name="settings_interval_summary">Set the interval of automatic updates</string>
     <string name="settings_intervals">Intervals</string>
-    <string name="settings_title_API">API Key</string>
-    <string name="settings_title_API_key">Enter API Key</string>
-    <string name="settings_title_API_key_reset">Reset API Key</string>
-    <string name="settings_update_interval">Update interval</string>
-    <string name="skip">Skip</string>
-    <string name="slide1_heading">Welcome!</string>
-    <string name="slide1_text">Privacy Friendly Weather is an App to check the current Weather and Forecasts for your Locations.</string>
+    <string name="settings_title_API">APIキー</string>
+    <string name="settings_title_API_key">APIキーを入力</string>
+    <string name="settings_title_API_key_reset">APIキーをリセット</string>
+    <string name="settings_update_interval">更新間隔</string>
+    <string name="skip">スキップ</string>
+    <string name="slide1_heading">ようこそ!</string>
+    <string name="slide1_text">Privacy Friendly Weatherはあなたの住んでいる地域の現在の天気と予報を確認できるアプリです。</string>
     <string name="slide2_heading">Key Elements</string>
     <string name="slide2_text">You can choose your own locations and get detailed information about the current weather. You can search for the best weather in a radius around you or place a widgets on your homescreen showing the current weather, a three day forecast or a five day forecast</string>
     <string name="slide3_text">The sourcecode of this app is available at GitHub. For further explanations have a look at the About Page.</string>
@@ -206,19 +206,19 @@
     <string name="threedaywidget_first">3-day widget (1)</string>
     <string name="threedaywidgetchoice_two">Set the second additional information for 3-day widgets at the bottom.</string>
     <string name="threedaywidget_second">3-day widget (2)</string>
-    <string name="rain_volume">Rain volume</string>
+    <string name="rain_volume">降雨量</string>
     <string name="wind">Wind</string>
     <string name="humidity">Humidity</string>
     <string name="activity_city_weather_tv_wind_direction">風向き</string>
     <string name="activity_city_weather_tv_rain_volume">雨量</string>
-    <string name="long_press_text">Long press to set as default city</string>
-    <string name="swipe_to_delete">Swipe to delete</string>
+    <string name="long_press_text">長押ししてデフォルト都市に登録</string>
+    <string name="swipe_to_delete">ワイプして削除</string>
     <string name="RainViewer">Rain Radar</string>
     <string name="weather_category_showerrain">Shower Rain</string>
     <string name="weather_category_showersnow">Shower Snow</string>
     <string name="settings_title_forecastChoice">Display options</string>
     <string name="settings_summary_forecastChoice">Select between 5 day / 3h and 2 day / 1h forecasts</string>
-    <string name="settings_forecastChoice">Forecast</string>
+    <string name="settings_forecastChoice">天気予報</string>
     <string name="widget_needs_city">A widget still needs %1$s. Please delete all widgets for this city first.</string>
     <string name="action_rainviewer">レインビュー</string>
     <string name="rain60min_text">"Next 60min: "</string>
@@ -249,8 +249,8 @@
     <string name="_6pm">6 pm</string>
     <string name="_10pm">10 pm</string>
     <string name="onedaywidgetchoice">Set the additional value for the one day forecast widget.</string>
-    <string name="theme_setting_summary">Select your thematic preference</string>
-    <string name="theme_setting_title">Theme</string>
+    <string name="theme_setting_summary">好みのテーマを選ぶ</string>
+    <string name="theme_setting_title">テーマ</string>
     <string name="help_permission_wakelock_heading">Permission: Keep the phone awake</string>
     <string name="help_permission_bindservice_heading">Permission: Bind to Job Service</string>
     <string name="help_permission_wakelock_description">To enable asynchronous update requests while keeping the app responsive, the Wakelock permission is needed. The background tasks in weather are not long and will not keep your phone awake for long times. But the permission is needed to run background services in this way.</string>