Yūsei Koga
Yūsei Koga | |
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Native name | 古賀悠聖 |
Born | (2001-01-01) January 1, 2001 (age 23) |
Hometown | Fukuoka, Japan |
Career | |
Achieved professional status | October 1, 2020(2020-10-01) (aged 19) |
Badge Number | 326 |
Rank | 6-dan |
Teacher | Isao Nakata (8-dan) |
Meijin class | B2 |
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
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
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 [ja] 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
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
Tsume Shogi Solving Competition
In March 2024, Koga won the 21st Tsume Shogi Solving Competition. He finished with a score of 73 points out of a possible 100 to win the competition for the first time. The tournament had been last held in 2019, but was cancelled from 2020 to 2023 due to the COVID-19 pandemic. Sōta Fujii 8-crown title holder, who won the competition the last five times it was held, did not participate in the competition.[10]
Notes
- ^ 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
- ^ "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 Shōdan 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.
- ^ Maruyama, Susumu (March 31, 2024). "Tsumeshōgi Kaitō Senshuken Koga Rokudan ga Hatsu Yūshō Gorenpa no Fujii Meijin wa Fusanka" 詰将棋解答選手権 古賀六段が初優勝 5連覇の藤井名人は不参加 [Tsume Shogi Solving Competition: Defending champion Sōta Fujii Meijin, who won the competition the last five times it has been held, decides not to participate]. Mainichi Shimbun (in Japanese). Archived from the original on April 1, 2024. Retrieved May 2, 2024.
External links
- ShogiHub: Professional Player Info · Koga, Yusei
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- Sōta Fujii
- Takeshi Fujii
- Kōichi Fukaura
- Bungo Fukusaki
- Masataka Gōda
- Yoshiharu Habu
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- Keita Inoue
- Kazuki Kimura
- Toshiaki Kubo
- Tadahisa Maruyama
- Yoshikazu Minami
- Hiroyuki Miura
- Taku Morishita
- Toshiyuki Moriuchi
- Takuya Nagase
- Osamu Nakamura
- Hisashi Namekata
- Amahiko Satō
- Yasumitsu Satō
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- Kōji Tanigawa
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- Masayuki Toyoshima
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- Kenji Waki
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- Naruyuki Hatakeyama
- Ichirō Hiura
- Kazushiza Horiguchi
- Eiji Iijima
- Akira Inaba
- Tetsurō Itodani
- Hiroki Iizuka
- Masaki Izumi
- Hiroshi Kamiya
- Kenji Kanzaki
- Kensuke Kitahama
- Hiroshi Kobayashi (b. 1976)
- Yasuhiro Masuda
- Ayumu Matsuo
- Yasuaki Murayama
- Daisuke Nakagawa
- Isao Nakata
- Hiroshi Naganuma
- Taichi Nakamura
- Hirotaka Nozuki
- Hisashi Ogura
- Shintarō Saitō
- Keiichi Sanada
- Yūki Sasaki
- Shūji Satō
- Tatsuya Sugai
- Masataka Sugimoto
- Masahiko Urano
- Takayuki Yamasaki
- Kenjirō Abe
- Kōru Abe
- Takanori An'yōji
- Sakio Chiba
- Kōhei Funae
- Naoya Fujiwara
- Shingo Hirafuji
- Kentarō Ishii
- Takumi Itō
- Hirotaka Kajiura
- Daisuke Katagami
- Kiyokazu Katsumata
- Takeshi Kawakami
- Kōichi Kinoshita
- Tadao Kitajima
- Masakazu Kondō
- Seiya Kondō
- Yoshiyuki Kubota
- Yūji Masuda
- Yoshiyuki Matsumoto
- Atsushi Miyata
- Shūji Muranaka
- Tomohiro Murata
- Akira Nishio
- Takuma Oikawa
- Takahiro Ōhashi
- Tadashi Ōishi
- Hiroshi Okazaki
- Tatsuya Sanmaidō
- Daichi Sasaki
- Makoto Sasaki
- Kazutoshi Satō
- Shin'ya Satō
- Shingo Sawada
- Kazuharu Shoshi
- Taichi Takami
- Issei Takazaki
- Kōsuke Tamura
- Makoto Tobe
- Ryūma Tonari
- Takahiro Toyokawa
- Kazushi Watanabe
- Norihiro Yagura
- Wataru Yashiro
- Hiroaki Yokoyama
- Mirai Aoshima
- Wakamu Deguchi
- Shin'ichirō Hattori
- Kei Honda
- Takashi Ikenaga
- Naohiro Ishida
- Shingo Itō
- Kōta Kanai
- Yūsei Koga
- Reo Kurosawa
- Mitsunori Makino
- Akihiro Murata
- Yūya Nagaoka
- Ryōsuke Nakamura
- Kazuhiro Nishikawa
- Takehiro Ōhira
- Satoru Sakaguchi
- Shin'ichi Satō
- Shōji Segawa
- Ryō Shimamoto
- Hideyuki Takano
- Satoshi Takano
- Yūichi Tanaka
- Yūsuke Tōyama
- Hiromu Watanabe
- Masakazu Watanabe
- Shin'ya Yamamoto
- Akihiro Ida
- Mikio Kariyama
- Naoki Koyama
- Reo Koyama
- Kanta Masegi
- Kenta Miyajima
- Saito Morimoto
- Reo Okabe
- Yūya Saitō
- Yūjirō Takahashi
- Hiroki Taniai
- Kenshi Tokuda
- Hirotoshi Ueno
- Taiki Yamakawa
- Tomoki Yokoyama
- Sōta Fujii (Ryūō, Meijin, Ōi, Ōza, Kiō, Ōshō and Kisei)
- Takumi Itō (Eiō)
Awarded |
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Qualifying |
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