diff --git a/locale/ja/LC_MESSAGES/Creational/Singleton/README.po b/locale/ja/LC_MESSAGES/Creational/Singleton/README.po
index 240c5c6..cc21253 100644
--- a/locale/ja/LC_MESSAGES/Creational/Singleton/README.po
+++ b/locale/ja/LC_MESSAGES/Creational/Singleton/README.po
@@ -2,7 +2,7 @@
 # Copyright (C) 2011-2019, Dominik Liebler and contributors
 # This file is distributed under the same license as the DesignPatternsPHP
 # package.
-# FIRST AUTHOR <EMAIL@ADDRESS>, 2020.
+# Sumita Takaki <sumita.takaki@gmail.com>, 2020.
 #
 #, fuzzy
 msgid ""
@@ -11,7 +11,7 @@ msgstr ""
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2020-05-04 00:50+0900\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Last-Translator: Sumita Takaki <sumita.takaki@gmail.com>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
@@ -20,51 +20,54 @@ msgstr ""
 
 #: ../../Creational/Singleton/README.rst:2
 msgid "`Singleton`__"
-msgstr ""
+msgstr "`シングルトン パターン`__"
 
 #: ../../Creational/Singleton/README.rst:4
 msgid ""
 "**THIS IS CONSIDERED TO BE AN ANTI-PATTERN! FOR BETTER TESTABILITY AND "
 "MAINTAINABILITY USE DEPENDENCY INJECTION!**"
 msgstr ""
+"**これはアンチパターンと捉えるべきです！"
+"よりよいテスト性と保守性のために、「依存性の注入」(Dependency injection）を使用してください！**"
 
 #: ../../Creational/Singleton/README.rst:8
 msgid "Purpose"
-msgstr ""
+msgstr "目的"
 
 #: ../../Creational/Singleton/README.rst:10
 msgid ""
 "To have only one instance of this object in the application that will "
 "handle all calls."
 msgstr ""
+"オブジェクトへの呼び出しを行うアプリケーション内で、そのオブジェクトのインスタンスが1つだけしか存在しないことを保証するために使用されます。"
 
 #: ../../Creational/Singleton/README.rst:14
 msgid "Examples"
-msgstr ""
+msgstr "例"
 
 #: ../../Creational/Singleton/README.rst:16
 msgid "DB Connector"
-msgstr ""
+msgstr "DBコネクター"
 
 #: ../../Creational/Singleton/README.rst:17
 msgid "Logger"
-msgstr ""
+msgstr "ロガー"
 
 #: ../../Creational/Singleton/README.rst:18
 msgid "Lock file for the application (there is only one in the filesystem ...)"
-msgstr ""
+msgstr "アプリケーションのロックファイル（ファイルシステムには一つしかありません...）"
 
 #: ../../Creational/Singleton/README.rst:22
 msgid "UML Diagram"
-msgstr ""
+msgstr "クラス図"
 
 #: ../../Creational/Singleton/README.rst:29
 msgid "Code"
-msgstr ""
+msgstr "サンプルコード"
 
 #: ../../Creational/Singleton/README.rst:31
 msgid "You can also find this code on `GitHub`_"
-msgstr ""
+msgstr "サンプルコードは `GitHub`_ でも確認することができます。"
 
 #: ../../Creational/Singleton/README.rst:33
 msgid "Singleton.php"
@@ -72,7 +75,7 @@ msgstr ""
 
 #: ../../Creational/Singleton/README.rst:40
 msgid "Test"
-msgstr ""
+msgstr "テスト"
 
 #: ../../Creational/Singleton/README.rst:42
 msgid "Tests/SingletonTest.php"