The problem? Without modification, the interface is strictly Japanese. For an English speaker, this makes basic tasks like Bluetooth pairing or radio presets a guessing game.
Look for the 設定 (Settings) or メニュー (Menu) button on the hardware or home screen. pioneer carrozzeria avic-rz33 japanese to english
While there is no "one-click" setting to change the language, users typically manage the device through these methods: Google Lens Translation The problem