JP Dreamcast games are often missing a barcode.
All below are JP Dreamcast version of the game
Sengoku Turb
GameID: 1316
PCID: 52539
Treasure Strike
GameID: 1212
PCID: 52617
Incoming: Ginrui Saishuu Kessen
GameID: 62376
PCID: 52361
Shutokou battle
GameID: 38657
PCID: 2381025
Kimi ga Nozomu Eien
GameID: 65521
PCID: 52386
Sega GT Homologation Special
GameID: 62373
PCID: 52531
Dream Passport
GameID: 61897
PCID: 4658486
Air
GameID: 854
PCID: 52206
Kanon
GameID: 84463
PCID: 52379
Net Golf
GameID: 976
PCID: 52452
Dream Passport 3
GameID: 61893
PCID: 4658485
Happy Breeding
GameID: 84461
PCID: 52347
Frame Gride
GameID: 788
PCID: 52317
Virtua Tennis: Sega Professional Tennis [Actually named Power Smash]
GameID: 1351
PCID: 52631
Revive
GameID: 995
PCID: 52509
Super Speed Racing
GameID: 26875
PCID: 52241
Animastar
GameID: 827
PCID: 52210
Seventh Cross
GameID: 1311
PCID: 52543
Pop’N Music 2
GameID: 1038
PCID: 52482
Interlude
GameID: 1110
PCID: 52365
Sakura Taisen 4
GameID: 1341
PCID: 52522
The below games linked to US prices on all Japan registered games
Virtua Striker 2
GameID: 1297
PCID: 52630
Sonic Adventure
GameID: 1321
PCID: 52558
Seaman
GameID: 1360
PCID: 52527
F1 World Grand Prix
GameID: 773
PCID: 52308