MFJ All Japan IA2 Motocross
| 2026 | |
| 2025 | Soya Nakajima |
| 2024 | Soya Nakajima |
| 2023 | Victor Alonso |
| 2022 | Jay Wilson |
| 2021 | Shinosuke Oshiro |
| 2020 | Yuki Yokoyama |
| 2019 | Yuki Yokoyama |
| 2018 | Taiki Koga |
| 2017 | Yusuke Watanabe |
| 2016 | Chihiro Noutsuka |
| 2015 | Toshiki Tomita |
| 2014 | Takeshi Katsuya |
| 2013 | Toshiki Tomita |
| 2012 | Kei Yamamoto |
| 2011 | Takuya Mihara |
| 2010 | Takuma Kojima |
| 2009 | Takeshi Katsuya |
| 2008 | Takeshi Katsuya |
| 2007 | Hiroaki Arai |
| 2006 | Yohei Kojima |
| 2005 | Yoshihide Fukudome |
| 2004 | Tomonori Nakamura |
| 2003 | Tetsuya Mizoguchi |
| 2002 | Shin’ichi Kaga |
| 2001 | Hisashi Tajima |
| 2000 | Kiyoshi Saai |
| 1999 | Takeshi Katsuya |
| 1998 | Kazumasa Masuda |
| 1997 | Shunji Takami |
| 1996 | Yuichiro Kawashima |
| 1995 | Yuichiro Kawashima |
| 1994 | Kazuyoshi Odagiri |
| 1993 | Yusuke Sasaki |
| 1992 | Okitsugu Ukegawa |
| 1991 | Tadao Ogishima |
| 1990 | Yasuo Tohfukuji |
| 1989 | Tetsumi Mitsuyasu |
| 1988 | Atsushi Okabe |
| 1987 | Atsushi Okabe |
| 1986 | Isao Ida |
| 1985 | Atsushi Okabe |
| 1984 | Yasuo Tohfukuji |
| 1983 | Satoru Shoji |
| 1982 | Masanori Ohzeki |
| 1981 | Yasuo Tohfukuji |
| 1980 | Yasuo Tohfukuji |
| 1979 | Tetsumi Mitsuyasu |
| 1978 | Katsuhiko Seo |
| 1977 | Katsuhiko Seo |
| 1976 | Torao Suzuki |
| 1975 | Yoshifumi Sugio |
| 1974 | Hideaki Suzuki |
| 1973 | Torao Suzuki |
| 1972 | Hideaki Suzuki |
| 1971 | Kinjiro Yajima |
| 1970 | Taichi Yoshimura |
| 1969 | Kinjiro Yajima |
| 1968 | Kazuyoshi Hoshino |
| 1967 | Taichi Yoshimura |
Series Name
- (1967-2004) : All Japan 125cc Motocross
All-time Round Wins
| Takeshi Katsuya | 15 |
| Yu Hirata | 14 |
| Toshiki Tomita | 12 |
| Soya Nakajima | 11 |
| Yoshihide Fukudome | 9 |
| Tetsuya Mizoguchi | 8 |
| Tomonori Nakamura | 8 |
| Kei Yamamoto | 8 |
| Yuki Yokoyama | 8 |
| Takuya Mihara | 7 |
| Yusuke Watanabe | 7 |
| Jay Wilson | 7 |
| Hiroaki Arai | 6 |
| Yohei Kojima | 6 |
| Taiki Koga | 5 |
All-time Round Wins
- No data (1967-2000)
All-time Qualifying
| No Data |
