If you try running the Touhou games on newer PC98 machines like my PC-9821 Na12 laptop, you might run into issues. When I tried to start any of the games, they would just hang on initialization of the sound driver. This makes sense, because my system has an enhanced FM chip, that is not fully backwards compatible with the original FM chips of the PC98. Interestingly, this has never been a problem in any game but in Touhou for me.
I tried to just load other FM drivers and then manually start the games, which nearly worked: I was able to use the menus, listen to the music, select new game… and then it would crash.