Well, as I have no idea, here you have some of the tracks in Japan that I have. Perhaps someone will get some inspiration, if the track is in the list (this post is NOT a guess, but a way to keep the thread alive):
Aida (TI Circuit)
Asan
Autopolis
Central Circuit
Chokuiri (Naoiri)
Ebisu
Fuji
Funabashi
Hamamatsu
Hokkaido
Inagawa
Kyushu
Mine (Nishinihon)
Motegi
Nakayama
Nasu
Nihonkai Maze
Nishi Sendai (Hiland Raceway)
Onnebetsu
Otaru
Sugo
Suzuka
Takasu
Tokachi
Tsukuba
Yatabe
PROVING GROUNDS & TEST TRACKS
Fukuroi
Jari
Tochigi