I might be able to take on and translate short blurbs of text for you, into japanese. Email me with the text you need translated and I'll see what I can do (if it's just short blurbs for banners, I'm pretty sure I can do it, not so sure about lots and lots of detailed text though). I also have a great font set in Japanese (kanji, hiragana, katakana, and roman letters) that I can pass along to you. Or I could even just do the banners for you myself.
lynn@sweetusagi.com