Manage Your Language Preference at Amazon Japan
You can choose Japanese, English, or Simplified Chinese as your preferred language on Amazon.co.jp.
To select your preferred language:
Go to Your Account.
Under Settings, click on Change Language Settings.
On the language settings page, click on the radio button 日本語 , English, or 简体中文, then save your changes.
The selected language will become the default language for your browsing and shopping experience when you are logged in. You will also be able to receive some kinds of communications from Amazon.co.jp in your preferred language.
Certain site features and/or messaging may not be available in English. Also, certain products sold on Amazon.co.jp may not have language-switching functions and/or multilingual user’s manuals. Please check the product details or directly contact the manufacturer to confirm such functionality.