[4][5] He remains the only Japanese rider to have won an Isle of Man TT race.

Itoh competed in a Can-Am style Suzuki Fronte RF single-seater in the JAF Grand Prix Formula Junior "Junior Seven Challenge Cup" race, held at Fuji International Speedway in 1970.

[7] While he was also supposed to have started in the JAF Grand Prix Tournament (also at Fuji) two weeks later, the Junior Seven Challenge Cup victory remained his only start in a JAF race.

[8] Itoh also famously partnered with Stirling Moss in December 1968 for a publicity high-speed run along Italy's 750 km (466 mi) Autostrada del Sole, which leads from Milan to Naples.

In the end, the average speed attained was 122.44 km/h (76.08 mph), respectable for a car with a mere 356 cc engine.