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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Kimi Kokura# | 1.044 | 2022-2025 | |
| 2 | Aftab Mengal | 1.028 | 2020-2025 | |
| 2 | Tamotsu Yamashita | 1.028 | 2023-2026 | |
| 4 | Tetsuzan Araki# | .995 | 2022-2025 | |
| 5 | Morihiro Yamasaki# | .919 | 2024-2027 |
