1991 Japanese Formula 3000 Championship

The 1991 Japanese Formula 3000 Championship was scheduled over 11 rounds and contested over 10 rounds. 27 different teams, 47 different drivers, five different chassis and three different engines competed.

Heroes Racing driver Ukyo Katayama won the championship and would step up to Formula One the following year. The 1991 season was also noteworthy for a one-off appearance by Michael Schumacher at the sixth round of the championship at Sportsland Sugo. Schumacher would finish second in his only appearance before making his Formula One debut four weeks later in Spa-Francorchamps, and would go on to win seven Formula One World Drivers' Championships.

36 cars attempted to qualify for the third round of the championship at Fuji, the most entries for a single Japanese top formula event.