diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
new file mode 100644
index 00000000..8977a18e
--- /dev/null
+++ b/app/src/main/res/values-ja/strings.xml
@@ -0,0 +1,35 @@
+<resources>
+    <string name="app_name">シンプル電卓</string>
+    <string name="copied_to_clipboard">値をクリップボードにコピーしました</string>
+
+    <!-- About -->
+    <string name="about">アプリについて</string>
+    <string name="website">もっとシンプルなアプリとソースコードは:\nhttp://simplemobiletools.com</string>
+    <string name="email_label">ご意見やご提案をお送りください:</string>
+    <string name="email">hello@simplemobiletools.com</string>
+    <string name="third_party_licences_underlined"><u>サードパーティー ライセンス</u></string>
+    <string name="rate_us_underlined"><u>Play ストアで評価してください</u></string>
+    <string name="follow_us">フォローしてください:</string>
+    <string name="version">v %1$s</string>
+    <string name="copyright">Copyright © Simple Mobile Tools %1$d</string>
+
+    <!--License-->
+    <string name="notice">このアプリは、私の人生を容易にするために、次のサードパーティのライブラリーを使用しています。 ありがとうございます。</string>
+    <string name="third_party_licences">サードパーティー ライセンス</string>
+    <string name="butterknife_title"><u>Butter Knife (ビュー インジェクター)</u></string>
+    <string name="butterknife_text">Copyright 2013 Jake Wharton\n\nLicensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.You may obtain a copy of the License at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS,WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions and limitations under the License.</string>
+    <string name="butterknife_url">https://github.com/JakeWharton/butterknife</string>
+    <string name="ambilwarna_title"><u>AmbilWarna (カラー ピッカー)</u></string>
+    <string name="ambilwarna_text">Copyright 2009-2015 Yuku\n\nLicensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.</string>
+    <string name="ambilwarna_url">https://github.com/yukuku/ambilwarna</string>
+    <string name="autofittextview_title"><u>AutoFitTextView (自動リサイズ テキストビュー)</u></string>
+    <string name="autofittextview_text">Copyright 2014 Grantland Chew\n\nLicensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.</string>
+    <string name="autofittextview_url">https://github.com/grantland/android-autofittextview</string>
+    <string name="robolectric_title"><u>Robolectric (ユニットテスト フレームワーク)</u></string>
+    <string name="robolectric_text">The MIT License\n\nCopyright (c) 2010 Xtreme Labs and Pivotal Labs\n\nPermission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</string>
+    <string name="robolectric_url">https://github.com/robolectric/robolectric</string>
+    <string name="espresso_title"><u>Espresso (UI テスト フレームワーク)</u></string>
+    <string name="espresso_text">Copyright 2014 The Android Open Source Project\n\nLicensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.</string>
+    <string name="espresso_url">https://google.github.io/android-testing-support-library/docs/espresso/index.html</string>
+
+</resources>