japanese games?

So its been two weeks since i got a PSP and so far i gathered

Gitaroo man lives
FFtactics War of the lions
valkyrie profile lenneth
Disgae Afternoon of darkness
Tales of eternia

Are there any more good japanese games available?

If your a fan of anime, than you're in heaven there.

You got Bleach, Gundam, Naruto, Initial D. (all only available in japanese)

But seeing you're a RPG fan, there are plenty of those also.

Jeanne D'Arc, brave new story traveler, Final Fantasy 7