Are any other "good" titles coming out in Japan soon for the PSP?

I know of the whole launch lot, and I owned half of them, but the only game that really took advantage of the PSP was RR.

So all I have right now is that...

Puyo Pop Fever was fun, but I have the EXACT same game on my Xbox.

Puzzle Bobble was great, and i might consider picking it up again when the price falls.

Mina no Golf was great as well, but too much Japanese text for me to enjoy it.

http://www.gamefaqs.com/portable/psp/releases.html

That's all that have release dates right now. Sadly the DS is in the same situation right now. Hopefully someone will make more announcements soon.