Kei specs:
Max Length 3.4m
Max Width 1.48m
Max hieght 2m
Max engine size 660cc
Max HP 63
Vehicles not meeting these specs pay more for registration, insurance, and they must provide proof they own or rent a parking space.
The first Honda cars I ever saw might have been Kei cars. The Honda 600 had a 600cc 2 cyl air-cooled motorcycle engine in it.
