I've updated our Yahoo!Japan Auctions guide with lots of new search terms, including Settei, gashapon, and the epic giants plush.
http://pkmncollectors.livejournal.com/314274.html
If you're looking for items, first check with www.jisho.org - then ask in the post :)
If you have any search terms to add, just leave them in a comment and I'll update the guide. Thanks!