put it thorught the translator on :
<a href="http://babelfish.altavista.com/tr" target="_blank">http://babelfish.altavista.com/tr</a>
and to bid on yahoo japan you may have to use these people <a href="http://www.celga.com" target="_blank">www.celga.com</a>
but it can be rather expensive (like 20 more than the auction really costs)for every item! just make sure you truly want that and would be willing to pay that price for it!
also there are sites such as <a href="http://www.importgamesjapan.com" target="_blank">www.importgamesjapan.com</a> (they should have it!)
i'd use them before the bidding service, only use them as a last resort because they're not afraid to pile on the fees!