Cassini is your friend.
You will need the bios but I've managed to get a japanese SOTN to work.
We should add this one to our Emulator section since it's the only one I've ever been able to get to work

I DIDN'T KNOW MARIA WAS A PLAYABLE CHARACTER! THE PSX VERSION SUCKS ASS!!!!!
I personally think she's better than Richter since she has some bad ass spells

Anyways, the emulator is VERY picky on the format of the CUE and ISO files

I've downloaded about 4 different games and only SOTN worked.
I'm currently looking for an english version since I don't know beanz about japanese.
I'm also looking for...
Bug
Bug Too
D
Nights into Dreams
Christmas Nights (DEMO)
Sonic Jam

So if anyone knows anything, Holla back at a brotha