Setting up a Japanese Playstation 4 account is easy. All you need is a Japan-based email address and your PlayStation 4’s Japanese language settings. To set up your account, first create an account on the PlayStation website. After creating an account, enter in your email address and password. Then, set up your PlayStation 4’s Japanese language settings to use the email address and password you created. Once you’ve set up your account, you can start playing games on your Playstation 4 by logging in with your Japan-based email address and password.