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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Tokuma Takeuchi | .4918 | 2015-2015 | |
| 2 | Ryoma Nakano# | .4902 | 2016-2016 | |
| 3 | Hideyori Kiyomizu# | .4694 | 2012-2012 | |
| 4 | Kazuhiko Kimura# | .4692 | 2015-2015 | |
| 5 | Kuniyuki Akiyama | .4658 | 2014-2014 | |
| 6 | Ryuzaburo Ine | .4622 | 2015-2015 | |
| 7 | Tsuruki Kiyomizu# | .4507 | 2015-2015 | |
| 8 | Joji Nakashima# | .4464 | 2016-2016 | |
| 9 | Juro Mizutani | .4408 | 2013-2013 | |
| 10 | Shimei Omori# | .4345 | 2012-2012 | |
| 11 | Yukio Kouno# | .4307 | 2013-2013 | |
| 12 | Hirotsugu Kaneko# | .4302 | 2013-2013 | |
| 13 | Motoichi Sugiyama# | .4281 | 2016-2016 | |
| 14 | Kosho Hayashi# | .4278 | 2015-2015 | |
| 15 | Matsusuke Kichikawa# | .4221 | 2014-2014 | |
| 16 | Shihi Yoshida# | .4203 | 2014-2014 | |
| 17 | Isei Ikeda | .4137 | 2013-2013 | |
| 18 | Hidetada Yamada# | .4100 | 2012-2012 | |
| 19 | Ryuzaburo Ohayashi | .4090 | 2014-2014 | |
| 20 | Tomiichi Kishita# | .4033 | 2013-2013 | |
| 21 | Takayuki Yamada | .3987 | 2014-2014 | |
| 22 | Akio Toyoda# | .3983 | 2014-2014 | |
| 23 | Yaichiro Noda# | .3950 | 2016-2016 | |
| 24 | Hirotsugu Kiyomizu | .3946 | 2015-2015 | |
| 25 | Kazu Abe | .3939 | 2014-2014 | |
| 26 | Kosami Kogawa# | .3938 | 2016-2016 | |
| 27 | Shunen Morita# | .3921 | 2016-2016 | |
| 28 | Kumanosuke Tagawa | .3912 | 2015-2015 | |
| 29 | Mitsuoki Suzuki# | .3822 | 2012-2012 | |
| 30 | Masami Kobayashi | .3818 | 2015-2015 | |
| 31 | Seinosuke Memoto | .3786 | 2014-2014 | |
| 32 | Tokugawa Yamanaka# | .3689 | 2016-2016 | |
| 33 | Horiuchi Shinohara | .3675 | 2014-2014 | |
| 34 | Norio Kono | .3562 | 2015-2015 | |
| 35 | Kikaku Hayashi | .3521 | 2012-2012 | |
| 36 | Masato Ogawa | .3465 | 2013-2013 | |
| 37 | Hiroji Ogawa# | .3462 | 2013-2013 | |
| 38 | Masaharu Hoshino# | .3452 | 2016-2016 | |
| 39 | Kiyoshi Kichida# | .3450 | 2015-2015 | |
| 40 | Katsumi Sakaguchi | .3422 | 2013-2013 | |
| 41 | Shusui Tanaka | .3283 | 2012-2012 | |
| 42 | Hidetada Iijima | .3279 | 2015-2015 | |
| 43 | Yoichi Yasuda | .3243 | 2015-2015 | |
| 44 | Shojiro Iida# | .3170 | 2012-2012 | |
| 45 | Toyoharu Kimura | .3158 | 2012-2012 | |
| 46 | Takuji Hakui# | .3127 | 2012-2012 | |
| 47 | Ton Mochizuki# | .3089 | 2012-2012 | |
| 48 | Takayuki Yoshida# | .3056 | 2016-2016 | |
| 49 | Shun'ichi Abe | .2982 | 2012-2012 | |
| 50 | Hisaki Ono | .2862 | 2012-2012 | |
| 51 | Ippei Kino | .2812 | 2012-2012 | |
| 52 | Masamune Morishita | .2652 | 2012-2012 | |
| 53 | Shinobu Sato# | .2206 | 2017-2017 |
