The feature described in this Help topic is only available if support for Japanese is enabled through Microsoft Office Language Settings.
You must also be using a Japanese Input Method Editor (IME).
Tip
You can manually change the interface language of the Input Method Editor (IME). On the Tools menu, click Options, and then click the Edit tab. Click IME Settings, and then click the General tab. Under Other settings, select a language in the Display menus and dialogs in box.