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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | IP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Kumanosuke Tagawa | 795.0 | 2015-2015 | |
| 2 | Tsuruki Kiyomizu# | 787.0 | 2015-2015 | |
| 3 | Hiroji Ogawa# | 778.0 | 2013-2013 | |
| 4 | Takuji Hakui# | 717.0 | 2012-2012 | |
| 5 | Toyoharu Kimura | 711.0 | 2012-2012 | |
| 6 | Yaichiro Noda# | 700.1 | 2016-2016 | |
| 7 | Masato Ogawa | 693.2 | 2013-2013 | |
| 8 | Kosho Hayashi# | 672.0 | 2015-2015 | |
| 9 | Norio Kono | 645.2 | 2015-2015 | |
| 10 | Akio Toyoda# | 616.1 | 2014-2014 | |
| 11 | Hirotsugu Kaneko# | 605.0 | 2013-2013 | |
| 12 | Shimei Omori# | 585.0 | 2012-2012 |
