Originally Posted by
ajGoes
I can't answer your questions regarding Japanese law but I would advise you to make sure your CPAP machine will operate on Japanese power. Tokyo and eastern Japan have 100 volts at 60 Hertz; western Japan has 100 volts at 50 Hertz.
Actually, the opposite is true regarding hertz. Tokyo/Eastern Japan is 50 hz, Osaka/Western Japan is 60 hz.