Education
He enjoyed his best season in 1987 when he finished the season in ninth place in the 500cc world championship.
He enjoyed his best season in 1987 when he finished the season in ninth place in the 500cc world championship.
He began his Grand Prix career in 1986.
His best General Practice qualifying position was fourth place, which he achieved several times that season. Yatsushiro won the following titles in domestic competition: 1981 Novice 250cc Japanese Champion (Yamaha), 1983 Formula One Japanese Champion (Kawasaki), 1984 Formula One Japanese Champion (Honda).