Since a direct setting is rarely available, users often rely on these methods to navigate the Japanese interface: How to Change Language on Panasonic CN-R500D Strada 25 Oct 2016 —

Practical recommendations

Since a direct language swap isn't possible, most users rely on the following:

can be frustrating if you don't speak the language. Often, these units are set to Japanese by default, but you can typically change the language to English to make navigation, Bluetooth, and audio settings much easier to use. 🔧 How to Change Panasonic CN-R500D to English

If the unit supports English, follow these steps:

Navigating a Japanese-spec head unit like the Panasonic CN-R500D

Determined, Kenji grabbed his phone and began his quest for the "Language" menu. 🔍 The Digital Translation