SpartanVXL: Does the head unit otherwise work well? I can read JP so if it's otherwise functionally sound I don't think I would replace :)
The Japanese head unit works great including the radio.
The only thing that doesn’t work is the navigation. The menus are easily translated with google translate and the camera on your phone. I find I didn’t use the menus after a couple of weeks with the car anyway.
If you are thinking of replacing the head unit it’s a good idea to wait a couple of weeks and see if you really need it.