Sammy Fatnassi has updated his Kanji learning application (Kanji is a Japanese Language) for the PSP, heres the info:
Kanji learning software for the Psp. Create Kanji/Hirigana/Katakana lists and practice remembering their pronunciation/translation through flashcards quizs. Aims to be estheticly pleasing and can be used as a Kanji dictionary.
There's also a Windows version (require DirectX 9).
The current version is Alpha, so doesn't contain all fonctionalities yet.