Going to Japan and buy from Japan

Converting the power supply to US voltage is a risky proposition. If you are going to do that, then just buy from one of many Japanese eBay sellers who offer "conversion models" giving you a similar cost savings.

I would not want some unknown tech opening up my Accuphase and tinkering around with its power supply. He might scratch the beautifully painted black chassis screws! LOL

Or use the Japanese 100V model with a high quality step-down converter. But you will always wonder if the converter is detrimental to the sound quality, and then maybe a $1,000 audiophile power cable can magically negate that effect! LOL

Sometimes you have to pay to play. The price of admission. Par for the course. 

"The bitterness of poor quality remains long after the sweetness of low price is forgotten."  - Benjamin Franklin

Unless you travel to Japan regularly, I would not recommend it. Should you need support or to return it. I used to go to Japan every month. That is the better scenario for buying expensive electronics. Even then, I never did it. I would prefer to hop in my car or have my dealer come over to my house. 

My rule of thumb on this stuff is that if my purchase just disappeared or broke and I would immediately laugh at my self and say... "now that was stupid"... I will not do it. 

when you bring it back, you will have to pay the tariffs

@nasaman 

Accuphase distributors are notorious for refusing to service units purchased out of country.

Your plan is a great idea if a) you have access to a local tech qualified to service / modify Accuphase products, or b) you yourself are that person.

If you’re in a browsing mood, check out www.hifido.co.jp/. Their website looks terrible, but if you read about the company you’ll find that they are very well respected.

You all miss the point. The man wants to buy a great piece of Japanese equipment while being in Japan. He is not asking for an advice whether to do it or not.