Would an American dishwasher work in Japan?

Question:

I mean in Kanto--where we have 50hz instead of 60hz like in the States. Maybe if I used a converter??

Answer:

The motor will run slower so it might be less efficent at its task, but assuming the voltages are within 10% I don't see any safety issues. If the controller uses the mains frequency to time how long to spend on each cycle that will also make it spend 20% more on each cycle. So in general I'd expect it to work, just not as well because you'll get less pressure. Anything to convert from 60Hz to 50Hz at the amount of power it would use would be more expensive than the machine itself.