Toyota Supra was one of the finest Japanese supercar: through tuning it easily reaches 600hp and can go over 1000hp.
It's revered as one of the most highly tuneable cars on the planet. The time attack version has much better aerodynamics and plenty of setup options. A much bigger single turbine and tuned engine for higher power make this a very capable car, if you can handle the turbo lag.
assetto-db.com - Assetto Corsa Database