In the process of working on the Suikogaiden Translation Project, I set about hunting for the game's Japanese font, thinking I could replace it with a Latin font and hack the code to change the character size. 

I eventually found the font, not in the game, but in the BIOS. I had been vaguely aware that the BIOS contained a Japanese font, but I didn't think it was actually used by games - based on documents and discussion of other projects, I had assumed games generally just shipped their own font, since the BIOS one seems to be a kinda crappy 1-bit font.

Has anybody else encountered a game that uses this?  Has anybody had to work around it by hacking their own font into the game where there wasn't one previously?

Doesn't Persona 2 (US version) use that same font too? Or maybe I'm remembering things wrong.

You mean the bios font or the one in my screen? Either way the answer is the same: no.

It's a custom version of Lucida Sans, one of the default fonts in Windows.