Concept Cars, Japan

Concept cars are ten radical in engine or design. Some use non-traditional, exotic, or expensive materials, ranging from paper to carbon fiber to refined alloys. Others have unique layouts, such as gullwing doors, 3 or 6 (or more) wheels, or special abilities not usually found on cars. Because these ten impractical or unpritable leanings, many concept cars never get past scale models, or even drawings in computer design. Other more traditional concepts can be developed into fully drivable (operational) vehicles with a working drivetrain and accessories. The state most concept cars lies somewhere in between and does not represent the final product. A very small proportion concept cars are functional to any useful extent, some cannot move safely at anything above 10 mph.
Inoperative "mock-ups" are usually made wax, clay, metal, fiberglass, plastic or a combination there.
If drivable, the drivetrain is ten borrowed from a production vehicle from the same company, or may have defects and imperfections in design. They can also be quite refined, such as General Motors' Cadillac Sixteen concept.