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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Germany Schaefer# | .5101 | 1909 | |
| 2 | Yoshinobu Nishio | .5034 | 1914 | |
| 3 | Siraj Haroun# | .4843 | 1914 | |
| 4 | Hakaru Okajima | .4594 | 1915 | |
| 5 | Wataru Higaki | .4535 | 1911 | |
| 6 | Alex Attwood | .4487 | 1913 | |
| 7 | Yoshinobu Nishio | .4476 | 1913 | |
| 8 | Hisayuki Oe | .4447 | 1910 | |
| 9 | Tokuyuki Yoshimura | .4424 | 1912 | |
| 10 | Tomoyuki Kanai | .4401 | 1910 | |
| 11 | Yoneo Watanabe | .4388 | 1915 | |
| 12 | Hakaru Okajima | .4378 | 1914 | |
| 13 | Guillaume Perrin# | .4369 | 1915 | |
| 14 | Masahiro Sasamoto | .4295 | 1911 | |
| 15 | Katsuya Yamasaki | .4273 | 1911 | |
| 16 | Masahiro Sasamoto | .4263 | 1915 | |
| 17 | John Hummel# | .4258 | 1909 | |
| 18 | John Hummel# | .4242 | 1910 | |
| 19 | Shogo Kanda | .4200 | 1915 | |
| 20 | Tomoyuki Kanai | .4175 | 1909 | |
| 21 | Frank LaPorte# | .4167 | 1909 | |
| 22 | Shogo Kanda | .4140 | 1914 | |
| 23 | Hisayuki Oe | .4136 | 1915 | |
| 24 | Yoshinobu Nishio | .4125 | 1912 | |
| 25 | Masahiro Sasamoto | .4098 | 1910 | |
| 26 | Kazunori Matsumoto | .4090 | 1915 | |
| 27 | Masahiro Sasamoto | .4075 | 1913 | |
| 28 | Alarico Moreno# | .4072 | 1912 | |
| 29 | Katsuya Yamasaki | .4036 | 1909 | |
| 30 | Wataru Higaki | .4034 | 1910 | |
| 31 | Alarico Moreno# | .3942 | 1910 | |
| 32 | Kazunori Matsumoto | .3940 | 1911 | |
| 33 | Alarico Moreno# | .3939 | 1911 | |
| 33 | Wataru Higaki | .3939 | 1913 | |
| 35 | Tokuyuki Yoshimura | .3918 | 1911 | |
| 36 | Yoneo Watanabe | .3901 | 1913 | |
| 37 | Eustaquio Sanha# | .3891 | 1913 | |
| 38 | Eustaquio Sanha# | .3844 | 1915 | |
| 39 | Shogo Kanda | .3838 | 1912 | |
| 40 | Yoneo Watanabe | .3827 | 1912 | |
| 41 | Takashi Yamashita | .3759 | 1911 | |
| 42 | Alarico Moreno# | .3756 | 1914 | |
| 43 | Kazunori Matsumoto | .3740 | 1912 | |
| 44 | Takashi Yamashita | .3726 | 1910 | |
| 45 | Mamoru Endo | .3716 | 1913 | |
| 46 | Masahiro Sasamoto | .3715 | 1914 | |
| 47 | Kanbu Nakano | .3707 | 1911 | |
| 48 | Alarico Moreno# | .3701 | 1913 | |
| 49 | Kiyohisa Iwata | .3690 | 1915 | |
| 50 | Wataru Higaki | .3684 | 1912 | |
| 51 | Wataru Higaki | .3672 | 1915 | |
| 52 | Buck Herzog# | .3653 | 1909 | |
| 53 | Katsuya Yamasaki | .3627 | 1910 | |
| 54 | Kanbu Nakano | .3624 | 1912 | |
| 55 | Tomoyuki Kanai | .3613 | 1911 | |
| 56 | Barry McCormick | .3610 | 1909 | |
| 56 | Kiyohisa Iwata | .3610 | 1909 | |
| 58 | Katsuya Yamasaki | .3590 | 1912 | |
| 59 | Guillaume Perrin# | .3584 | 1914 | |
| 60 | Hisayuki Oe | .3582 | 1914 | |
| 61 | Kazunori Matsumoto | .3580 | 1913 | |
| 62 | Katsuya Yamasaki | .3554 | 1914 | |
| 63 | Tokuyuki Yoshimura | .3552 | 1910 | |
| 64 | John Hummel# | .3518 | 1911 | |
| 65 | Yoshinobu Nishio | .3508 | 1915 | |
| 66 | Toshishige Hayashida | .3500 | 1910 | |
| 67 | Alarico Moreno# | .3489 | 1915 | |
| 68 | Wataru Higaki | .3478 | 1909 | |
| 69 | Hisayuki Oe | .3461 | 1909 | |
| 70 | Shogo Kanda | .3457 | 1910 | |
| 71 | Shogo Kanda | .3452 | 1913 | |
| 72 | Kazunori Matsumoto | .3431 | 1914 | |
| 73 | Rafael Henao# | .3388 | 1911 | |
| 74 | Hideaki Nakano | .3359 | 1912 | |
| 75 | Kanbu Nakano | .3342 | 1913 | |
| 76 | Eustaquio Sanha# | .3291 | 1914 | |
| 77 | Masahiro Sasamoto | .3282 | 1909 | |
| 78 | Masahiro Sasamoto | .3259 | 1912 | |
| 79 | Satoru Fukui | .3196 | 1912 | |
| 80 | Kiyohisa Iwata | .3134 | 1912 | |
| 81 | Mamoru Endo | .3097 | 1915 |
