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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Yachi Okamoto# | 1.094 | 2016-2016 | |
| 2 | Kohei Takeuchi | 1.084 | 2013-2013 | |
| 3 | Tetsu Nishimura# | 1.058 | 2012-2012 | |
| 4 | Toyoaki Ishikawa# | 1.039 | 2015-2015 | |
| 5 | Takuma Kobayashi | 1.034 | 2013-2013 | |
| 6 | Taki Wada# | 1.032 | 2014-2014 | |
| 7 | Sekien Ohashi | 1.029 | 2014-2014 | |
| 8 | Ichizo Hirose | 1.013 | 2012-2012 | |
| 9 | Nobuo Sugahara | 1.003 | 2014-2014 | |
| 10 | Hiroji Sugahara | 1.001 | 2014-2014 | |
| 11 | Katsumoto Nakayama# | 0.993 | 2014-2014 |
