Kotonishiki Katsuhiro (born June 8, 1968 as Hideyuki Matsuzawa) is a former sumo wrestler from Takasaki, Gunma Prefecture, Japan.

He earned eighteen special prizes during his career, second on the all-time list, and defeated yokozuna eight times when ranked as a maegashira.

After competing in the National Junior High School Sumo Championships at the age of 14, he met former yokozuna Kotozakura who persuaded him to join Sadogatake stable.

Kotonishiki followed up with an excellent 12-3 in November, finishing as runner-up to Konishiki, the closest any maegashira yūshō winner has come to repeating the feat in the next tournament.

Although he produced many good performances over the next few years, he was never consistent enough to mount another challenge for ōzeki promotion, and was overtaken by younger wrestlers such as the Hanada brothers Takanohana and Wakanohana, and then Takanonami and Musashimaru.

These plus his three Fighting Spirit Prizes gave him a total of eighteen career sanshō, the most ever at the time (although he was overtaken the following year by Akinoshima).

Now over 30 years of age, Kotonishiki was no longer able to maintain a position in the san'yaku ranks, but he was still a threat, as he defeated yokozuna in three consecutive tournaments from March to July 1999.

On his comeback in July he scored an 8-7 majority of wins at the rank of jūryō 1 but did not get promoted back to the top division; an extremely rare occurrence.

In the September 2000 tournament, after losing six of his first seven bouts, he announced his retirement from sumo, saying that he had reached his physical limit and could no longer overcome his various injuries.

[6][7] His stable is known for breaking out of traditional shackles, also being an animal shelter and a bakery, the latter having been opened at the instigation of his wife and by his eldest daughter.

[2] It was announced in February 2017 that his 18 year old son, Akihide Matsuzawa, would be joining his Asahiyama stable as a professional sumo wrestler upon graduation from high school in March.

[12] Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi