Unless you speak Japanese or want to drop a lot 
of money on *good* translation software, you're 
not going to get anywhere with an only-Japanese-
speaking seller on Yahoo Japan. Like the other 
posters, I would recommend a Deputy Service like 
Keigo at Celga. Best of all, if you go to Celga's 
page (does anyone have the link handy?), there is 
a link to the Yahoo Japan cel auctions for a 
number of series - including Dragonball. Meaning 
you don't even have to mess around with the Yahoo 
Japan search engine. (Although that can be fun! 
When you feed in the kanji for "Blue Seed", you 
get not only items relating to the anime Blue 
Seed, but also LOTS of auctions for. . . blue 
panties. o_0;  Yes, you read that correctly. 0_o;)

In any case, I do recommend downloading the 
Japanese font, if nothing else. I think the free 
online sites that translate webpages require it 
to function. (Yes? No? I don't use them, so I'm 
not completely sure.)

But in any case, don't feel frightened by the 
idea of getting a cel via deputy service. You 
don't have to do a single thing on Yahoo Japan 
yourself except look! Everything involoving 
needing to know Japanese will be fully handled by 
someone who knows the language. You can even ask 
for clarifications on what a description says 
before you commit to bidding. I've gotten cels 
through Keigo before and I haven't got even one 
bad thing to say!  ^_^

Many Sharp Smiles,
--Drac