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Games played by Osuka Seira
Total: 27; won: 9; winning percentage: 33.3%
| Game Date and Game Description | |||||
| Black | White | Result | Replay | Download | |
 [2022-12-12] 48th Japanese Kisei, preliminary
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| Oya Koichi 9p | Osuka Seira 1p | B+6.5 |  |
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| [2022-11-17] 8th Senko Cup Women's Strongest, preliminary
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| Aoba Kaori 5p | Osuka Seira 1p | B+4.5 | |
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| [2022-10-31] 26th Japanese Female Kisei, round 1
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| Osuka Seira 1p | Takao Mari 1p | W+0.5 | |
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| [2022-04-21] 41st Japanese Female Honinbo, round 1
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| Osuka Seira 1p | Ueno Risa 1p | W+8.5 | |
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| [2022-04-01] 3rd Japanese Discovery Cup, preliminary
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| Osuka Seira 1p | Cho Koharu 1p | B+R | |
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| [2022-04-01] 3rd Japanese Discovery Cup, preliminary
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| Fujisawa Rihide Insei | Osuka Seira 1p | B+2.5 | |
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| [2022-04-01] 3rd Japanese Discovery Cup, preliminary
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| Hirano Kaito Insei | Osuka Seira 1p | B+R | |
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| [2022-02-28] 47th Japanese Shinjin O, round 1
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| Osuka Seira 1p | Moro Arisa 2p | W+R | |
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| [2021-12-06] 47th Japanese Shinjin O, preliminary
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| Tsukada Chiharu 1p | Osuka Seira 1p | W+R | |
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| [2021-10-11] 25th Japanese Female Kisei, round 1
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| Osuka Seira 1p | Xie Yimin 7p | W+R | |
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| [2021-09-02] 31st Japanese Ryusei, group A
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| Seki Kotaro 4p | Osuka Seira 1p | B+9.5 | |
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| [2021-07-21] 2nd Japanese Discovery Cup, preliminary
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| Tanaka Yuki 1p | Osuka Seira 1p | B+R | |
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| [2021-04-05] 8th GLOBIS Cup, Japanese preliminary
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| Osuka Seira 1p | Kitazawa Masaaki 1p | W+R | |
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| [2021-02-18] 60th Japanese Judan, preliminary
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| Sugiuchi Kazuko 8p | Osuka Seira 1p | W+R | |
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| [2020-11-30] 40th Japanese Female Honinbo, preliminary
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| Ueno Risa 1p | Osuka Seira 1p | B+9.5 | |
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| [2020-10-08] 24th Japanese Female Kisei, round 1
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| Osuka Seira 1p | Konishi Kazuko 8p | W+4.5 | |
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| [2020-01-27] 7th GLOBIS Cup, Japanese preliminary
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| Osuka Seira 1p | Nakamura Sumire 1p | W+R | |
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| [2020-01-21] Year 2020 Taiwan-Japan Elite Go Exchange, round 6
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| Osuka Seira 1p | Huang Youteng 1p | B+R | |
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| [2020-01-21] Year 2020 Taiwan-Japan Elite Go Exchange, round 5
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| Yu Lijun 3p | Osuka Seira 1p | B+3.5 | |
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| [2020-01-20] Year 2020 Taiwan-Japan Elite Go Exchange, round 4
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| Osuka Seira 1p | Bai Xinhui 2p | B+R | |
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| [2020-01-20] Year 2020 Taiwan-Japan Elite Go Exchange, round 3
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| Osuka Seira 1p | Yang Zixuan 3p | W+R | |
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| [2020-01-18] Year 2020 Taiwan-Japan Elite Go Exchange, round 2
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| Osuka Seira 1p | Niu Shite 2p | W+R | |
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| [2020-01-18] Year 2020 Taiwan-Japan Elite Go Exchange, round 1
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| Lin Yuting 1p | Osuka Seira 1p | W+R | |
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| [2020-01-16] 46th Japanese Gosei, preliminary C
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| Shiraishi Yuichi 7p | Osuka Seira 1p | B+2.5 | |
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| [2019-12-26] 46th Japanese Meijin, preliminary
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| Hagiwara Mutsumi 7p | Osuka Seira 1p | W+R | |
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| [2019-11-21] 45th Japanese Kisei, preliminary
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| Nyu Eiko 2p | Osuka Seira 1p | W+1.5 | |
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| [2019-10-24] 39th Japanese Female Honinbo, preliminary
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| Nakajima Mieko 2p | Osuka Seira 1p | W+4.5 | |
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