The Japan Grand Prix was an annual professional wrestling tournament held by the promotion All Japan Women's Pro-Wrestling (AJW) to determine the number one contender for the promotion's highest achievement, the WWWA World Heavyweight Championship. The tournament was held in the summer every year from 1985 to 2004. In 2005, AJW was closed for good, and the WWWA Championship was abandoned.
The 1985 Japan Grand Prix was a 10-woman round-robin tournament concluding on June 25, 1985.
The 1985 Japan Grand Prix was a 12-woman round-robin tournament concluding on June 22, 1986.
The 1987 Japan Grand Prix was a 13-woman round-robin tournament concluding on June 28, 1987.
The 1988 Japan Grand Prix was an 11-woman round-robin tournament concluding on June 26, 1988.
The 1989 Japan Grand Prix was a 19-woman single-elimination tournament held from June 25 to August 24, 1989.
The 1990 Japan Grand Prix was a seven-woman single-elimination tournament concluding on June 17, 1990.
The 1991 Japan Grand Prix was a 16-woman single-elimination tournament held from July 7 to August 18, 1991.
The 1992 Japan Grand Prix was a round-robin tournament consisting of two 10-woman blocks, held from June 27 to August 30, 1992.
The 1993 Japan Grand Prix was a round-robin tournament consisting of two eight-woman blocks, with the top two finishers from each block advancing to a single-elimination tournament. It was held from May 3 to August 21, 1993.
The 1994 Japan Grand Prix was a 10-woman round-robin tournament held from June 3 to August 28, 1994.
The 1995 Japan Grand Prix was a 16-woman round-robin tournament, consisting of two eight-woman blocks, concluding on September 3, 1995.
The 1996 Japan Grand Prix was a 12-woman round-robin tournament held from July 14 to August 30, 1996.
The 1997 Japan Grand Prix was a 12-woman round-robin tournament concluding on August 10, 1997.
The 1998 Japan Grand Prix was a round-robin tournament consisting of two six-woman blocks, with the top three finishers from the Main League and the top finisher from the Junior League advancing to a single-elimination tournament. It was held from June 14 to August 9, 1998.