PREF, having it up my watch

On this app, there are three ways to practice Japanese letters, Kanji that relates to Prefecture name of Japan in particular.

The first way is to practice a single Kanji letter selecting from a Letter list page. 

The second way is to practice a Prefecture name selecting from a Prefecture name list page.

The third way is also to practice a Prefecture name though; you can make sure where each prefecture is located in Japan using a Prefecture name list before practicing a Prefecture name you have chosen on the list.

Lastly, I would like you to feel like having a bit of Kanji letters and a simple map of Japan up your Apple Watch, as the saying goes, "have something up one's sleeve."