Jason, google some auctions bidding services ( bid on Japan yahoo ), they charge a commission but you can buy what you like when it comes to tosogu. Swords, most wont handle some will. You have to use translating service to get an idea what the descriptions say, but as others have stated its hit and miss with the translating services.
Beware that it is like ebay there are alot of fakes and good ones, that take a keen eye to spot. but the good stuff goes for high prices like ebay so there are no bargins to be found on there.
ive personally bought lots from Japan yahoo but iam warning you be carefull, expect to pay top dollar for good quality items.
Also because your using a bidding service its not like bidding on ebay, you have to place your bid and hope for the best, you cant place a bid at the last seconds to try and win an auction like on ebay, so if you find something you like work out how much you want to pay and then place your maximum bid and hope for the best. Also you will have to pay upfront first if you donot win the auction to can get a refund from your auction bidding service. Thats the only way we westerners can bid on there unless you know someone in Japan.
My advise would be to try and buy good items from known dealers, yahoo and ebay is mostly full of junk that the good collectors donot want with the occasional good item thrown in.
regards Ed