Racers compete during ISU-1 Hanyu Grand Prix, while taking part in the office chair race ISU-1 Grand Prix series, in Hanyu, north of Tokyo, Japan, June 9, 2019. The rattle of tiny plastic wheels echoed through the normally sleepy streets of Hanyu on Sunday morning (June 9) as the small city 60 kilometres north of Tokyo played host to the Japan office chair 'Isu' grand prix. REUTERS/Issei Kato

Racers compete during ISU-1 Hanyu Grand Prix, while taking part in the office chair race ISU-1 Grand Prix series, in Hanyu, north of Tokyo, Japan, June 9, 2019. Founded 10 years ago and inspired by Formula One and Le Mans endurance racing, the race sees teams of three battle it out on ordinary office furniture across two gruelling hours to see who can complete the most laps of the 200 metre course. REUTERS/Issei Kato

Racers compete during ISU-1 Hanyu Grand Prix, while taking part in the office chair race ISU-1 Grand Prix series, in Hanyu, north of Tokyo, Japan, June 9, 2019. Propelling the chair backwards was the universal tactic employed by the racers, who were at least spared the added constriction of business dress with competitors choosing their own outfits. REUTERS/Issei Kato

A racer crushes during ISU-1 Hanyu Grand Prix, while taking part in the office chair race ISU-1 Grand Prix series, in Hanyu, north of Tokyo, Japan, June 9, 2019. REUTERS/Issei Kato

Racers compete during ISU-1 Hanyu Grand Prix, while taking part in the office chair race ISU-1 Grand Prix series, in Hanyu, north of Tokyo, Japan, June 9, 2019. REUTERS/Issei Kato

Racers compete during ISU-1 Hanyu Grand Prix, while taking part in the office chair race ISU-1 Grand Prix series, in Hanyu, north of Tokyo, Japan, June 9, 2019. REUTERS/Issei Kato