Yūsei Koga
| Yūsei Koga | |
|---|---|
| Native name | 古賀悠聖 |
| Born | January 1, 2001 |
| Hometown | Fukuoka, Japan |
| Career | |
| Achieved professional status | October 1, 2020 (aged 19) |
| Badge Number | 326 |
| Rank | 6-dan |
| Teacher | Isao Nakata (8-dan) |
| Meijin class | C2 |
| Ryūō class | 6 |
| Websites | |
| JSA profile page | |
Yūsei Koga (古賀 悠聖, Koga Yūsei, January 1, 2001) is a Japanese professional shogi player ranked 6-dan.
Early life and apprentice professional[edit]
Koga was born in Fukuoka, Japan on February 13, 1996.[1] He learned how to play shogi from his grandfather when he was about four years old.[2][3]
Koga entered the Japan Shogi Association's apprentice school in September 2011 as a protegee of shogi professional Isao Nakata.[2][3] He was promoted to the rank of apprentice professional 3-dan in April 2017 and obtained full professional status and the rank of 4-dan after finishing third in the 67th 3-dan League (April 2020 – September 2020) with a record of 13 wins and 5 losses.[2][3][4][5] Although Koga's third place finish was not sufficient to earn him direct promotion to 4-dan, it was good enough to earn him a second promotion point which gave him the option to enter the professional ranks as a free class player. After consulting with his mentor Nakata, Koga decided he wanted to turn professional even if it meant starting in the Free Class.[2][3][a]
Shogi professional[edit]
In September 2021, Koga was promoted to Meijin Class C2 after defeating Hirotaka Kajiura 7-dan to reach the finals of the 52nd Shinjin-Ō tournament. Koga's victory meant that he satisfied the criteria for promotion to Class C2 for the 80th Meijin League (April 2022 – March 2023).[7][8]
Promotion history[edit]
The promotion history for Koga is as follows.[9]
- 6-kyū: September 2011
- 3-dan: April 2017
- 4-dan: October 1, 2020
- 5-dan: March 14, 2023
- 6-dan: March 5, 2024
Notes[edit]
- ^ Koga earned his first promotion point in third place with a record of 13 wins and 5 losses in the 65th 3-dan League (April 2019 – September 2019).[3][6]
References[edit]
- ^ "Kishi Dētabēsu: Koga Yūsei" 棋士データベース: 古賀悠聖 [Professional Shogi Player Database: Yūsei Koga] (in Japanese). Japan Shogi Association. Retrieved October 3, 2020.
- ^ a b c d "Itō Takumi Toppu Tsūka, Tomita Seiya Shōdan Shōreikai Sandan Rīgu" 伊藤匠トップ通過, 冨田誠也昇段 奨励会三段リーグ [Apprentice professional 3-dan League: Takumi Itō finishes first, but Seiya Tomita also promoted.]. Nikkan Sports (in Japanese). September 26, 2020. Retrieved October 3, 2020.
- ^ a b c d e "Shin Yonden Tanjō no Oshirase" 新四段誕生のお知らせ [New 4-dans announced] (in Japanese). Japan Shogi Association. September 26, 2020. Retrieved October 3, 2020.
- ^ "Tomita, Koga ga Shin Shōgi Kishi Nishiyama wa Josei Hatsu Nogasu" 冨田, 古賀が将棋棋士に 西山は女性初逃す [Tomita and Koga promoted to professional status; Nishiyama misses chance to become first female to become regular professional.]. Tokyo Shimbun (in Japanese). Kyodo News. September 26, 2020. Retrieved October 3, 2020.
- ^ "Dai Rokujūnanakai Shōreikai Sandan Rīgusen Nisennijūnen Shigatsu kara Nisennijūnen Kugatsu" 第67回奨励会三段リーグ戦 2020年4月～2020年9月 [67th apprentice school 3-dan league: April 2020 to September 2020] (in Japanese). Japan Shogi Association. 2020. Retrieved October 3, 2020.
- ^ "Dai Rokujūgokai Shōreikai Sandan Rīgusen Nisenjūkyūnen Shigatsu kara Nisenjūkyūnen Kugatsu" 第65回奨励会三段リーグ戦 2019年4月～2019年9月 [65th apprentice school 3-dan league: April 2019 to September 2019] (in Japanese). Japan Shogi Association. 2019. Retrieved October 3, 2020.
- ^ "Koga Yūsei Yondan ga Kesshō Shinshutsu Hatashi Shīkyū Nikumi Shōkyū Furīkurasu kara Jūninme" 古賀悠聖四段が決勝進出果たしC級2組昇級 フリークラスから10人目 [Yūsei Koga promoted to Meijin Class C2 from the Free Class after advancing to finals; he is the 10th professional to be promoted from Free Class.]. Nikkan Sports (in Japanese). September 8, 2021. Retrieved October 4, 2021.
- ^ "Koga Yūsei Yodan, Furīkurasu kara Shikyū Nikumi e Shōkyū" 古賀悠聖四段, フリークラスからC級2組へ昇級 [Yūsei Koga promoted to Class C2 from Free Class] (in Japanese). Japan Shogi Association. September 8, 2021. Retrieved October 4, 2021.
- ^ "Kishi Dētabēsu: Koga Yūsei Sōodan Rireki" 棋士データベース: 古賀悠聖 昇段履歴 [Professional Shogi Player Database: Yūsei Koga Promotion History] (in Japanese). Japan Shogi Association. Retrieved April 5, 2024.
External links[edit]
- ShogiHub: Professional Player Info · Koga, Yusei
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