Here is a really quick and rough tutorial for enabling the Japanese keyboard on your iPhone, which allows you to type in hiragana, katakana, and kanji. For some reason, even though there is rumor that the iPhone will be making its way sometime not too far from now to Japan, the Japanese language keyboard is not enabled on the device, though its functionality is clearly working and arguably ready to go.

(Thanks to the info http://web.mac.com/mac_scott/ and …