In the world of automotive aftermarket navigation, the Panasonic CN-HDS625D occupies a unique and frustratingly specific niche. Often found in Japanese Domestic Market (JDM) imports—think Nissan Elgrands, Toyota Alphards, or Mitsubishi Delicas—this unit is a marvel of 2010s engineering. It combines DVD playback, digital TV tuners, and proprietary "Gorilla" navigation.

If you have imported a vehicle with this unit still installed, you are likely staring at a sea of Japanese Kanji, Hiragana, and Katakana. The common assumption is that a "Language" button exists. It does not. At least, not in the way Western electronics present it.

However, for the international owner, there is a single, glaring problem: