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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | IP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Kosuke Niwa | 3246 | 1938-1944 | |
| 2 | Norinaga Takase# | 2885 | 1939-1947 | |
| 3 | Hoshi Noda | 2873 | 1938-1946 | |
| 4 | Keiichi Sakamoto | 2732 | 1938-1942 | |
| 5 | Umito Nishioka# | 2340 | 1941-1947 | |
| 6 | Eiju Miyake# | 2235 | 1940-1947 | |
| 7 | Ikumasa Fujimoto# | 1758 | 1940-1947 | |
| 8 | Yukihiko Miyamoto | 1391 | 1938-1944 | |
| 9 | Eiji Kobayashi# | 1217 | 1944-1947 | |
| 10 | Gihei Nakamura# | 1169 | 1944-1947 | |
| 11 | Takayuri Mukai | 1137 | 1938-1941 | |
| 12 | Souji Yamashita# | 1129 | 1939-1947 | |
| 13 | Itsuma Kaneda# | 1044 | 1941-1947 | |
| 14 | Masahide Teramoto | 1009 | 1938-1940 | |
| 15 | Tomoharu Kanda# | 976 | 1946-1947 | |
| 16 | Masanao Kawai# | 964 | 1941-1947 | |
| 17 | Ryusuke Shimamoto | 958 | 1938-1942 | |
| 18 | Masato Yokoyama | 950 | 1938-1941 | |
| 19 | Kosaburo Nakagawa# | 611 | 1942-1947 |
