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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Kousei Ota# | .4034 | 1959 | |
| 2 | Kousei Ota# | .4004 | 1961 | |
| 3 | Kousei Ota# | .3992 | 1960 | |
| 4 | Kousei Ota# | .3956 | 1958 | |
| 5 | Hiroji Orido# | .3852 | 1960 | |
| 6 | William Hancock# | .3761 | 1961 | |
| 7 | Kannon Yamamoto# | .3747 | 1955 | |
| 8 | Hiroji Orido# | .3745 | 1959 | |
| 9 | Kousei Ota# | .3739 | 1955 | |
| 10 | Kazuaki Mukai# | .3693 | 1954 | |
| 11 | Kiyoshi Yamasaki | .3689 | 1952 | |
| 12 | Kiyohiro Aoyagi# | .3667 | 1960 | |
| 13 | Ikuhiko Murata | .3644 | 1958 | |
| 14 | Hiroji Orido# | .3628 | 1961 | |
| 15 | Kiyohiro Aoyagi# | .3613 | 1961 | |
| 16 | Kazuaki Mukai# | .3583 | 1960 | |
| 16 | Michinao Okamoto | .3583 | 1952 | |
| 18 | Kiyoshi Yamasaki | .3566 | 1951 | |
| 19 | Kousei Ota# | .3562 | 1957 | |
| 20 | Jokichi Kono# | .3552 | 1961 | |
| 21 | Tadao Hasegawa# | .3548 | 1956 | |
| 21 | William Hancock# | .3548 | 1960 | |
| 23 | Yakumo Nishi | .3533 | 1953 | |
| 24 | Kazuaki Mukai# | .3526 | 1957 | |
| 25 | Jokichi Kono# | .3498 | 1959 | |
| 26 | Meguru Morioka# | .3465 | 1961 | |
| 27 | Hiroji Orido# | .3447 | 1957 | |
| 28 | Kiyoshi Yamasaki | .3446 | 1958 | |
| 29 | Ikuhiko Murata | .3439 | 1955 | |
| 30 | Kazuaki Mukai# | .3427 | 1958 | |
| 31 | Hiroji Orido# | .3422 | 1958 | |
| 32 | Kazuaki Mukai# | .3401 | 1956 | |
| 33 | Tadao Hasegawa# | .3355 | 1961 | |
| 34 | Kazuaki Mukai# | .3327 | 1953 | |
| 35 | Yasushi Mori | .3299 | 1951 | |
| 36 | Jokichi Kono# | .3288 | 1958 | |
| 37 | Tadao Hasegawa# | .3251 | 1959 | |
| 38 | Kazuaki Mukai# | .3243 | 1961 | |
| 39 | Yasushi Mori | .3242 | 1950 | |
| 40 | Meguru Morioka# | .3241 | 1956 | |
| 41 | Koto Seki# | .3175 | 1960 | |
| 42 | Teiljo Otani# | .3154 | 1955 | |
| 43 | Kiyohiro Aoyagi# | .3138 | 1958 | |
| 44 | Shouya Kishimoto | .3118 | 1951 | |
| 45 | Teiljo Otani# | .3117 | 1958 | |
| 46 | Tadao Hasegawa# | .3103 | 1958 | |
| 47 | Meguru Morioka# | .3059 | 1959 | |
| 48 | Meguru Morioka# | .2928 | 1957 | |
| 49 | Teiljo Otani# | .2925 | 1956 | |
| 50 | Tadao Hasegawa# | .2830 | 1960 | |
| 51 | Jokichi Kono# | .2807 | 1960 | |
| 52 | Kiyohito Nojima# | .2775 | 1957 | |
| 53 | Shouya Kishimoto | .2673 | 1950 |
