Known widely as the "King of Speed" before a bad accident 10 years ago while trying to break 300 km/h in an RX-7 FC, he was inspired to go back to street racing when he encountered the Devil Z, going as far as to get a new car, a highly tuned RX-7, from his oldest friend Kazuo Ota, a genius tuner who founded the Speed Factory RGO with Masaki long ago. He has a special fondness for rotary engines, and makes up for a lack of raw power with handling ability.