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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Yukio Kubo# | 1.113 | 1943 | |
| 2 | Yukio Kubo# | 1.095 | 1946 | |
| 3 | Yukio Kubo# | 1.093 | 1942 | |
| 4 | Yukio Kubo# | 1.089 | 1947 | |
| 5 | Satomu Kono | 1.080 | 1940 | |
| 6 | Katsuki Takano | 1.077 | 1938 | |
| 7 | Satomu Kono | 1.058 | 1942 | |
| 8 | Yukio Kubo# | 1.050 | 1941 | |
| 8 | Satomu Kono | 1.050 | 1944 | |
| 10 | Satomu Kono | 1.049 | 1941 | |
| 11 | Yukio Kubo# | 1.045 | 1944 | |
| 12 | Teruhiko Iwahashi# | 1.042 | 1946 | |
| 13 | Satomu Kono | 1.041 | 1938 | |
| 13 | Susumu Sasada | 1.041 | 1938 | |
| 13 | Souta Aoyama# | 1.041 | 1938 | |
| 16 | Hokuto Yamamoto# | 1.036 | 1946 | |
| 17 | Tomoyoshi Takeuchi# | 1.035 | 1946 | |
| 18 | Teruhiko Iwahashi# | 1.032 | 1940 | |
| 19 | Susumu Sasada | 1.026 | 1939 | |
| 20 | Yoshizumi Smith# | 1.024 | 1943 | |
| 21 | Hokuto Yamamoto# | 1.023 | 1947 | |
| 22 | Susumu Sasada | 1.021 | 1940 | |
| 23 | Satomu Kono | 1.017 | 1939 | |
| 24 | Susumu Sasada | 1.016 | 1942 | |
| 25 | Teruhiko Iwahashi# | 1.013 | 1939 | |
| 26 | Katsuki Takano | 1.010 | 1944 | |
| 27 | Teruhiko Iwahashi# | 1.008 | 1947 | |
| 28 | Shigemi Hiramoto# | 1.007 | 1947 | |
| 29 | Toyonobu Iwasaki | 1.006 | 1939 | |
| 29 | Teruhiko Iwahashi# | 1.006 | 1942 | |
| 31 | Teruhiko Iwahashi# | 1.005 | 1943 | |
| 31 | Toyonobu Iwasaki | 1.005 | 1940 | |
| 33 | Tomoyoshi Takeuchi# | 1.002 | 1947 | |
| 34 | Yoshizumi Smith# | 0.998 | 1939 | |
| 35 | Yoshizumi Smith# | 0.996 | 1947 | |
| 36 | Satomu Kono | 0.988 | 1943 | |
| 37 | Katsunosuki Nakamura# | 0.983 | 1947 | |
| 38 | Teruhiko Iwahashi# | 0.978 | 1941 | |
| 39 | Tomoyoshi Takeuchi# | 0.977 | 1944 | |
| 39 | Yoshizumi Smith# | 0.977 | 1940 | |
| 41 | Shigemi Hiramoto# | 0.974 | 1946 | |
| 42 | Yoshizumi Smith# | 0.971 | 1944 | |
| 43 | Yoshizumi Smith# | 0.970 | 1946 | |
| 44 | Yoshizumi Smith# | 0.966 | 1941 | |
| 44 | Yoshizumi Smith# | 0.966 | 1942 | |
| 46 | Souta Aoyama# | 0.964 | 1943 | |
| 46 | Saburo Miyamoto# | 0.964 | 1947 | |
| 48 | Souta Aoyama# | 0.961 | 1941 | |
| 49 | Toshiharu Miura# | 0.956 | 1944 | |
| 50 | Souta Aoyama# | 0.954 | 1940 | |
| 51 | Toshiharu Miura# | 0.952 | 1946 | |
| 52 | Souta Aoyama# | 0.950 | 1939 | |
| 53 | Katsunosuki Nakamura# | 0.946 | 1946 | |
| 54 | Masahito Kato | 0.944 | 1938 | |
| 55 | Toshiharu Miura# | 0.941 | 1947 | |
| 56 | Kaoru Ishii | 0.929 | 1941 | |
| 57 | Souta Aoyama# | 0.926 | 1942 |
