Hello, I may have a chance to go to

Japan with my boyfriend. He is being sent there on business and I am going to look at cd players while I am there (if I go). Japan and the US have different voltage requirements, does a voltage converter work well? Does it change the sound? If they do work, will they work permanently? My boyfriend is about as clueless as I am, so we're both wondeering if it would be worth buying a cd player over there. I am mainly interested in Accuphase, they are so expensive over here that I may be able to find one over there but what good would it do me if I can't play it? Thank you all.