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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Masamune Kawai | .4802 | 2014-2014 | |
| 2 | Mashashi Kogawa# | .4714 | 2013-2013 | |
| 3 | Atsumori Sakamoto | .4604 | 2013-2013 | |
| 4 | Mutsuhito Takeda | .4516 | 2013-2013 | |
| 5 | Totoya Sakei# | .4477 | 2014-2014 | |
| 6 | Teruo Suzuki# | .4457 | 2016-2016 | |
| 7 | Natsume Fujihara# | .4362 | 2012-2012 | |
| 8 | Takeichi Hamada | .4302 | 2016-2016 | |
| 9 | Satoshi Kuhabara# | .4271 | 2015-2015 | |
| 10 | Moromao Kouda# | .4177 | 2014-2014 | |
| 11 | Tomokazu Samurakami# | .4156 | 2016-2016 | |
| 12 | Takao Kato | .4145 | 2013-2013 | |
| 13 | Kakuzo Minami | .4132 | 2014-2014 | |
| 14 | Natsu Sasaki# | .4019 | 2016-2016 | |
| 15 | Kaoru Agano | .4015 | 2016-2016 | |
| 16 | Hisanobu Inoue | .3994 | 2014-2014 | |
| 17 | Daisuke Murakami | .3971 | 2013-2013 | |
| 18 | Eichiro Kondo | .3843 | 2012-2012 | |
| 19 | Tetsui Ohayashi | .3832 | 2013-2013 | |
| 20 | Izo Kichikawa | .3831 | 2012-2012 | |
| 21 | Jun'ichi Ogura# | .3764 | 2012-2012 | |
| 22 | Magobei Uchida | .3762 | 2015-2015 | |
| 23 | Tsugahara Yamamoto# | .3750 | 2017-2017 | |
| 24 | Mitsuoki Aoki | .3620 | 2014-2014 | |
| 25 | Shunen Kobayashi | .3595 | 2013-2013 | |
| 26 | Yoshii Nakamura# | .3539 | 2016-2016 | |
| 27 | Ichiyo Nakashima# | .3416 | 2017-2017 | |
| 28 | Toshiro Hirano | .3398 | 2014-2014 | |
| 29 | Kazuyuki Yamada# | .3357 | 2014-2014 | |
| 30 | Yuki Saikawa | .3343 | 2015-2015 | |
| 31 | Kenji Nakada | .3323 | 2012-2012 | |
| 32 | Jotaro Harada | .3300 | 2013-2013 | |
| 33 | Yoshitora Suzuki# | .3290 | 2015-2015 | |
| 34 | Masaru Suzuki# | .3278 | 2016-2016 | |
| 35 | Ryosei Honma | .3256 | 2012-2012 | |
| 36 | Sen Aoki# | .3229 | 2016-2016 | |
| 37 | Ryutaro Kodama | .3225 | 2014-2014 | |
| 38 | Shintaro Ikarashi# | .3219 | 2016-2016 | |
| 39 | Teinosuke Yamada | .3158 | 2015-2015 | |
| 40 | Toshimichi Kanda | .3134 | 2014-2014 | |
| 41 | Hyotaru Noro | .3117 | 2015-2015 | |
| 42 | Hoshi Okumura | .3112 | 2015-2015 | |
| 43 | Motonobu Higashi | .3022 | 2015-2015 | |
| 44 | Yasukazu Chikafuji | .2936 | 2015-2015 | |
| 45 | Tamasaburo Yamasaki | .2788 | 2015-2015 | |
| 46 | Sadao Yamaguchi | .2770 | 2013-2013 | |
| 47 | Masahiko Takahashi# | .2733 | 2012-2012 |
