README in radiant-1.0.0.rc1

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+ new
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 = I18n Ja
 
-Description goes here
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+This is Japanese translation for the Radiant Admin interface.
+
+--- Japanese ---
+
+radiant-japanese_language_pack-extensionは Radiant の
+Admin インターフェイスを日本語化するためのエクステンションです。
+
+Radiant 0.9.1 (gem)でテストされています。
+
+ インストール方法
+
+cd path/to/project
+cd vendor/extensions
+git clone git://github.com/radiant/radiant-japanese_language_pack-extension.git japanese_language_pack
+cd ../..
+vi config/environment.rb
+
+  config.extensions = [ :japanese_language_pack, :all ]
+
+Radiant を再起動。
+admin にログインし　setting - personal タブへ行き　Language プルダウンを「日本語」にします。
+
+--- English ---
+
+Tested only Radiant 0.9.1 (gem)
+
+How to install radiant-japanese_language_pack-extension.
+
+cd path/to/project
+cd vendor/extensions
+git clone git://github.com/radiant/radiant-japanese_language_pack-extension.git japanese_language_pack
+cd ../..
+vi config/environment.rb
+
+  config.extensions = [ :japanese_language_pack, :all ]
+
+Restart Radiant.
+Login the Radiant administrative interface.
+click the setting link at the top of the screen then click personal
+Choose Language 日本語 Japanese.