Luxman L-509Z Integrated Amplifier

I just examined the inside of a 507ux.  The transformer was not multi-voltage, so I doubt you'll have a good chance of purchasing a US version in Japan.  Seems like they went out of their way to ensure they could keep the product lines separated.

Get a step down transformer.  Aside from wasting a bit of electricity it won't impact the sound quality. If anything it may actually help smooth current to the amp and add a layer of protection against an electrical surge. 

Wow! That's a $5000 difference! I wonder how much Accuphase is in Japan?

It's crazy right ? :) That's what I think too. I mean I understand some markup but not almost double, that seems like a ripoff :) 

@perkadin thanks for your response. Interesting as the dealers on ebay offered to include the step down transformer. But according to Paul McGowan of PS Audio he says that the transformer needs to be good quality and at 10x of the required power (which is pretty impossible to do). 

Do you have any suggestions on quality transformer brands ?