I’ll try to be helpful but may well get it wrong….as far as I can work out, the fitted satnav only works in Japan as they use a different system. Options would be to change the head unit to get android or apple car play, but depending on the head unit you have, this might not be possible. You’re then down to having car play or android auto installed on your existing head unit via a wee box. Guy in Birmingham does this for around £350, which is a whole lot cheaper than a new head unit. Hopefully that’s been of some help, and if this info is incorrect then someone please correct me!