Kōbōyama Daizo (born 15 August 1957 as Kokichi Yomogida) is a former sumo wrestler from Tsukidate, Kurihara, Miyagi Prefecture, Japan. His highest rank was sekiwake. He is now a sumo coach.
He came from a family of beef cattle farmers. He was a Prefectural Junior School Sumo Champion.[1]
He joined Takashima stable in 1973, recruited by former ōzeki Mitsuneyama, although he was transferred to Kumagatani stable in 1982 upon the retirement of his stablemaster. He reached the top makuuchi division in November 1981, and was runner-up to Chiyonofuji in July 1982, earning his first special prize for Technique. In November 1983 he won his second technique prize and was promoted all the way from maegashira 7 to sekiwake, which was to be his highest rank.[2] He made the sanyaku ranks only one more time, at komusubi in September 1985. He specialised in moro-zashi, or using two hands inside his opponent's arms to grab the mawashi, and was fond of the unusual kimarite or technique of tottari, the arm bar throw.[1]
He fell to the juryo division in 1990, retiring at the end of that year. He became an elder of the Japan Sumo Association, and re-established the Takashima stable in 1993. The stable closed in June 2011 when its only remaining wrestler retired, and Takashima moved to Kasugayama stable to work as a coach there.