Can't get my modded US PS2 to work in Japan, powers up but does nothing. Do i need a power convertor

Can't get my modded US PS2 to work in Japan, powers up but does nothing. Do i need a power convertor?
Japan is 100v / maybe vibration killed it!
PlayStation - 1 Answers
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The frequency rate of Japanese AC (That' alternating current electricity, not air con) is different from American AC. It's the reason why American alarm clocks run slow when plugged mains electricity in Japan. You need a mains converter.