This is my list of known WELLY castings that represent Japanese vehicles.

July 2 2016 - ​ if you think I've missed something, please let me know.

WELLY
Honda
2068 - Honda S2000
2255 / 8186 - 2002 Honda Integra Type R
Lexus
2243 - Lexus SC430
Mazda
8381 - 1987 Mazda RX-7
106 - 1979 Mazda RX-7
Mitsubishi 
2247 - Mitsubishi Pajero 
2258 - 2003 Mitsubishi Lancer Evolution VIII 
Nissan 
52246 - Nissan Fairlady Z / 350Z 
8380 - Nissan 300ZX 
108 - Nissan 280Z 2+2
Subaru 
2241 / 8189 - 2002 Subaru Impreza WRX STi 
Toyota 
2239 - 2001 Toyota Celica 
52289 - 2007 Toyota Camry 
----- - Toyota Yaris 5-door 
52292 - 2007 Toyota Corolla 
----- - Toyota Land Cruiser Prado 
113 - 1982 Toyota Celica Supra