I'll go ahead and list all the Japanese games I have...even the ones that came out in the U.S. My list is more impressive that way. ^_^
PS2:
Beatmania IIDX 3rd Style
Beatmania IIDX 4th Style
Beatmania IIDX 5th Style
Beatmania IIDX 6th Style
Final Fantasy X
Ridge Racer 5
Shin Sangokumusou
Tekken Tag Tournament
PSX:
Beatmania Append 4th Mix
Famicom:
Baseball
Downtown Nekketsu Monogotari
Super Mario Bros. 3
Super Famicom:
F-Zero
Kunio no Oden
Mario's Super Picross
Game Boy:
Kunio's Dodgeball
Pocket Monsters Red