Kōji Tosa

Kōji Tosa (土佐 浩司, Tosa Kōji, March 30, 1955) is a retired Japanese professional shogi player who achieved the rank of 8-dan.[1]

Kōji Tosa
Native name土佐浩司
Born (1955-03-30) March 30, 1955
HometownMinamiuonuma
NationalityJapanese
Career
Achieved professional statusFebruary 19, 1976(1976-02-19) (aged 20)
Badge Number124
Rank8-dan
RetiredMay 14, 2020(2020-05-14) (aged 65)
TeacherShizuo Seino (8-dan)
Tournaments won1
Meijin classfree
Ryūō class6
Websites
JSA profile page

Shogi professional

Tosa's only tournament victory as a shogi professional came in 1998 when he defeated Toshiyuki Moriuchi to win the 32nd Hayazashi Shogi Senshuken.[2]

In August 2010, Tosa defeated Kiyozumi Kiriyama in 69th Meijin Class B2 league play to become the 42nd professional to win 600 official games.[3][4]

In March 2017, Tosa finished the finished 75th Meijin Class C2 league play (April 2016 – March 2017) with a record of no wins and 10 losses, earning a second demotion point which meant he was only one point away from automatic demotion to "Free Class" play.[5] As a result, he declared his intention to the Japan Shogi Association to become a Free Class player as of April 2017 rather than risk automatic demotion.[6]

On June 8, 2020, the Japan Shogi Association announced on its website that Tosa had retired from professional shogi. His official retirement date was given as May 14, 2020.[7]

Promotion history

The promotion history for Tosa is as follows:[8]

  • 1971: 6-kyū
  • 1973: 1-dan
  • 1976, February 19: 4-dan
  • 1984, April 1: 5-dan
  • 1989, April 14: 6-dan
  • 1997, July 25: 7-dan
  • 2014, September 18: 8-dan
  • 2020, May 14: Retired

Titles and other championships

Tosa has never appeared in a major title match, but he has won one non-title shogi championships during his career.[9]

Awards and honors

Tosa received the JSA's "25 Years Service Award" in 2000 in recognition of being an active professional for twenty-five years and the "Shogi Honor Award" in 2010 for winning 600 official games.[10]

gollark: Anyway, we hit *those* limits ages ago, so we achieve our high clocks by extending the processors out into arbitrarily many orthogonal dimensions, ignoring the "speed of light", and patterning the logic gates directly onto underlying physical laws.
gollark: https://en.wikipedia.org/wiki/Rapid_single_flux_quantum
gollark: Clock speeds are constrained mostly by CMOS processes as far as I know, lightspeed issues are secondary.
gollark: What? Superconducting logic circuits can easily hit tens of GHz.
gollark: Well, it or the newer models.

References
  1. "Kishi Dētabēsu: Tosa Kōji" 棋士データベース: 土佐浩司 [Professional Shogi Player Database: Kōji Tosa] (in Japanese). Japan Shogi Association. Retrieved January 21, 2020.
  2. "Hayazashi Shōgi Senshuken･Hayazashi Shineisen [Rekidai Yūshōsha Ichiran]" 早指し将棋選手権戦･早指し新鋭戦 [歴代優勝者一覧] [Hayazahi Shogi Senshuken･Hayszashi Shineisen [List of winners]] (in Japanese). Japan Shogi Association. Retrieved January 21, 2020.
  3. "Tosa Kōji Shichidan Roppyakushō (Shōgi Eiyoshō) wo Tassei" 土佐浩司七段, 600勝 (将棋栄誉賞) を達成！ [Kōji Tosa 7d reaches 600 wins] (in Japanese). Japan Shogi Association. August 9, 2010. Retrieved January 21, 2020.
  4. "Morishita Kudan ga Tsūsan Happyakusho" 森下九段が通算800勝 [Morishita 9d wins 800th official game]. Asahi Shimbun (in Japanese). August 26, 2010. Retrieved January 21, 2020.
  5. "Dai Nanajūgonki Meijinsen･Jun'isen Shikumi Nikyū" 第75期名人戦･順位戦 C級2組 [75th Meijin Tournament Class C2] (in Japanese). Japan Shogi Association. 2016. Retrieved January 21, 2020.
  6. "Nisenjūnananendo kara no Furī Kurasu Tenshutsusha" 2017年度からのフリークラス転出者 [Players Moving to the Free Class from the 2017 Shogi Year] (in Japanese). Japan Shogi Association. March 31, 2017. Retrieved January 21, 2020.
  7. "Tosa Kōji Hachidan, Itō Hirofumi Shichidan ga Intai" 土佐浩司八段, 伊藤博文七段が引退 [Kōji Tosa 8-dan and Hirofumi Itō 7-dan retire from professional play] (in Japanese). Japan Shogi Association. June 8, 2020. Retrieved June 11, 2020.
  8. "Kishi Dētabēsu: Tosa Kōji Shōdan Rireki" 棋士データベース: 土佐浩司 昇段履歴 [Professional Shogi Player Database: Kōji Tosa Promotion History] (in Japanese). Japan Shogi Association. Retrieved June 8, 2020.
  9. "Kishi Dētabēsu: Tosa Kōji Yūshō Rireki" 棋士データベース: 土佐浩司 優勝履歴 [Professional Shogi Player Database: Kōji Tosa Championship History] (in Japanese). Japan Shogi Association. Retrieved January 21, 2020.
  10. "Kishi Dētabēsu: Tosa Kōji Sonota Hyōshō" 棋士データベース: 土佐浩司 その他表彰 [Professional Shogi Player Database: Kōji Tosa Other Awards] (in Japanese). Japan Shogi Association. Retrieved January 21, 2020.
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