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Koichi Ishizuka| Result | Opponent | Weight | Method | Event | Date | Location |
|---|---|---|---|---|---|---|
| Win | Yuto Hokamura | 134 lb | Decision (split) | Rizin 41 – Osaka | 2023-04-01 | Osaka, Japan |
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google2023-04-01 - Rizin 41 – Osaka - Osaka, Japan
Osaka, Japan| Result | Opponent | Weight | Method | Event | Date | Location |
|---|---|---|---|---|---|---|
| Win | Yuto Hokamura | 134 lb | Decision (split) | Rizin 41 – Osaka | 2023-04-01 | Osaka, Japan |
Bantamweight (134 lb / 61 kg)
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Winner: Koichi Ishizuka via Decision (split)
| User #1 |  |
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Yuto Hokamura via Decision |
| User #2 |  |
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Koichi Ishizuka via Submission in round 2 |
| User #3 | |
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Koichi Ishizuka via Decision |
| Result | Opponent | Weight | # | Method | Event | Date | Location |
|---|---|---|---|---|---|---|---|
| Loss | Ji Yong Yang | 134 lb | TKO (punches), R3 (0:19) | Rizin World Series in Korea | 2025-05-31 |  Incheon, South Korea |
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| Loss | Kyoma Akimoto | 134 lb | TKO (punches and knees), R1 (3:16) | Rizin 48 | 2024-09-29 | Saitama, Japan |
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| Win | Daiki Tsubota | 134 lb | Decision (unanimous) | Rizin Landmark 9 | 2024-03-23 | Kobe, Japan |
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| Loss | Koichi Ishizuka | 134 lb | Decision (split) | Rizin 41 – Osaka | 2023-04-01 | Osaka, Japan |
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| Loss | Yuki Motoya | 134 lb |  |
Decision (unanimous) | Rizin 33 - Saitama | 2021-12-31 | Saitama, Japan |
| Loss | Naoki Inoue | 134 lb | 
| Decision (unanimous) | Rizin 30 - Saitama | 2021-09-19 | Saitama, Japan |
| Win | Kuya Ito | 134 lb |  |
Decision (unanimous) | Rizin 29 – Osaka | 2021-06-27 | Osaka, Japan |
| Loss | Kenta Takizawa | 134 lb | Decision (split) | Rizin 24 - Saitama | 2020-09-27 | Saitama, Japan |
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| Win | Kenji Kato | 134 lb | Submission (rear naked choke), R1 (4:21) | Rizin 21 – Hamamatsu | 2020-02-22 | Hamamatsu, Japan |
Bantamweight (134 lb / 61 kg)
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Winner: Koichi Ishizuka via Decision (split)
| User #1 | Yuto Hokamura via Decision |
| User #2 | Koichi Ishizuka via Submission in round 2 |
| User #3 | Koichi Ishizuka via Decision |