@@user-sp6rw6vg8zwow thank you. So Japanese Electricity very similar with US Electrical System. US basic electrical system is 120V, they use two phase 120V 180° to get 240V or some places like apartement use 120° (get 208V) for high power appliances. Talking about frequency, West Japan use 60 Hz because they bought generator from GE which is US Company, while East Japan use 50 Hz because they bought generator from AEG which is German Company