When I was living in japan, I bought numerous items from Yahoo auctions.
if your japanese is not that flash, you will struggle by yourself. The hardest part is probably transfering the money to the buyer. This is done at an ATM(mostly in japanese), so you need to have a japanese bank account, and know how to perform a transfer. Also communicating with the sellers would be difficult. Sending the item is not too bad, you just need to know how to explain how you want it shipped (air or sea).
My best advice is to make friends with someone that is willing to help you! Bidding on items is the easy part!![]()