I played this probably around two decades ago on a Windows PC, I think while I was in my Freshman year of college around 1998-1999. I remember it as a point-and-click adventure game with 2D art that looked like a mix of painting and paper cutouts. The protagonist was Japanese, I think, and might have been a warrior. I don't remember a ton of the gameplay other than that it was possible to die, and when you did, you were thrown into some sort of hell with demons, and had to escape (I know I managed to do so a few times). But what made the game kind of unique at the time was that was steeped in Japanese mythology, which was still very neat and exotic to me.
I did not own a legitimate copy of it, having had a much more relaxed approach to copurightcopyright law at the time. I forget which site I downloaded it off of, probably Home of the Underdogs. Which... OK, found the right search, posting a self-answer.