i was thinking of importing some JP only PSP games because the psp has no region lock, and i was just wondering if its worth it
Isn't that a difficult question for us to answer?
You must decide for yourself whether it is worth it TO YOU. If you want a JP exclusive game and it's in a price range you deem affordable, then I say it's worth it.
One thing you'd have to consider is the language barrier, though.
Cho Aniki should be your first purchase. It should be your first purchase regardless of console, actually. You gotta dive right in to the wacky world of Japanese gaming head first.
The PSP has some really great Japan-exclusives. You should definitely check out Parodius Portable and if you like Hatsune Miku and rhythm games, get Project Diva. I won them both and they're fantastic.
the only problem i would encounter (as with jap nintendo stuff) is language barrier...curse my love for imported games....