Doug Polen is an American former professional motorcycle road racer. Polen was a dominant national and world champion road racer in the late 1980s and early 1990s, culminating with his Superbike world championships in 1991 and 1992. He raced successfully in AMA Superbike, Japanese Superbike Championship, Superbike World Championship and endurance racing. Polen was inducted to the AMA Motorcycle Hall of Fame in 2011.

The All Japan Road Race Championship is the premiere motorcycle road racing championship in Japan. It is run by the Motorcycle Federation of Japan (MFJ) (日本モーターサイクルスポーツ協会) – the Japanese affiliate of the FIM.