The phrases that actually come up — ordering, paying, catching trains, sitting at a sushi counter, getting into a bath, asking for help. Half of them are things you'll hear said to you, which is the half most phrasebooks skip. Tap Listen to hear it from a native Japanese voice, or Show to throw the Japanese full-screen and point your phone at someone.
Audio isn’t playing in this browser. Opening this page in its own tab often fixes it. Otherwise your device has no Japanese voice — Safari on Mac and iPhone has one built in; on Windows add Japanese under Settings › Time & language › Speech; on Android install Google Text-to-Speech Japanese.