No FM-TOWNS? Tsk, tsk...
So far for retro Japanese PCs I only have a Canon V-25 MSX2 (and of course a Marty which is a consolized FM-Towns). But a good friend of mine has an X68000 I will play over his house. I do have a small library of games for Japanese PCs:
FM-Towns/Marty:
Alshark
Emerald Dragon
Lesser Mern
X68000:
The weird Ys port where all the graphics are digitized
Twinbee
Jewel BEM Hunter Lime
MSX:
Nothing yet
Some great games worth playing on the X68k while I'm here: