 Japanese motorcycle Grand Prix

The Japanese Motorcycle Grand Prix (日本グランプリ) was a motorcycling event that is part of the Grand Prix motorcycle racing season.The main venue who held the races for years was the Suzuka Circuit, until it permanently was replaced by the Twin Ring Motegi from 2004 onwards after the circuit faced criticism for its short runoff area's and dangerous trackside barriers, causing the death of Japanese rider Daijiro Kato and the injuries of Marco Melandri and Alex Barros at the 2003 Japanese Grand Prix.