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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OPS | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Teruhiko Iwahashi# | .7645 | 1938-1947 | |
| 2 | Yoshizumi Smith# | .7636 | 1939-1947 | |
| 3 | Tomoyoshi Takeuchi# | .6931 | 1944-1947 | |
| 4 | Hokuto Yamamoto# | .6451 | 1938-1947 | |
| 5 | Souta Aoyama# | .6417 | 1938-1947 | |
| 6 | Yukio Kubo# | .6099 | 1940-1947 | |
| 7 | Susumu Sasada | .5474 | 1938-1943 | |
| 8 | Satomu Kono | .5373 | 1938-1944 |
