Is a street racer from Tochigi prefecture, and the son of Ken Kogashiwa. He was a go-kart driver in his youth, later having a brief stint as a street racer (originally on motorcycles, and then later cars) before becoming a professional racer and joining Katagiri. He originally drove his father's Toyota MR2, before getting his own Toyota MR-S when he became a professional.
Often known simply as the MR2 or by its chassis code "SW20", was the signature vehicle of Kai Kogashiwa when he was a solo racer on Irohazaka. The MR2 is equipped with a 3S-GE, a naturally aspirated engine. The cars actual output is unknown, but a stock model could produce 175PS.
