Kōbōyama Daizō
髙望山大造
Personal information
Born	Kōkichi Yomogida (1957-08-15)15 August 1957 (age 67) Tsukidate, Miyagi, Japan
Height	1.79 m (5 ft10+1⁄2 in)
Weight	135 kg (298 lb; 21.3 st)
Career
Stable	Takashima → Kumagatani
Record	579-606-21
Debut	March, 1973
Highest rank	Sekiwake (January, 1984)
Retired	November, 1990
Elder name	Takashima
Special Prizes	Technique (2)
* Up to date as of July 2012.

Kōbōyama Daizō (born 15 August 1957 asKōkichi Yomogida) is a formersumo wrestler from Tsukidate,Kurihara,Miyagi Prefecture,Japan. He made his professional debut in 1973 and reached the topmakuuchi division in 1981. His highest rank wassekiwake. He earned twospecial prizes for Technique and was a runner-up in one tournament. He retired in 1990. He is now a sumo coach and ran the Takashima stable from 1993 until 2011. He was elected to theJapan Sumo Association's board of directors in 2018.

He came from a family of beef cattle farmers. He was a Prefectural Junior School Sumo Champion.^[1]

He joinedTakashima stable at the age of 15 in March 1973, recruited by formerōzekiMitsuneyama. There were a large number of new recruits in that tournament because of a rule change. Also among them was the future top division wrestlerChikubayama. He made thejuryo division in May 1981 at the age of 23. He reached the topmakuuchi division for the first time in November 1981, although he was demoted back tojuryo after three tournaments. In May 1982 he took part in a playoff for thejuryo division championship oryusho and although he was defeated (he would never win a championship in any division) he was promoted back to the top division. He was transferred toKumagatani stable in the same year upon the retirement of his stablemaster. He was runner-up toChiyonofuji in July 1982, earning his firstspecial prize for Technique. In November 1983 he won his second Technique prize and was promoted all the way frommaegashira 7 tosekiwake, because of the failure of the men above him in the rankings to obtainwinning records. This was to be his highest rank.^[2] He won only two bouts in this tournament and made thesanyaku ranks only one more time, atkomusubi in September 1985. He struggled against the top ranked wrestlers, failing to defeat ayokozuna in 17 attempts, and beating anozeki only twice in 35 attempts (Asashio andHokutenyu once each). Nevertheless he was ranked in the top division for 42 straight tournaments from re-enteringmakuuchi in March 1983, before being finally demoted to thejuryo division after the January 1990 tournament.

Koboyama served regularly as thetsuyuharai to Chiyonofuji for theyokozuna'sdohyo-iri ceremony, even though the two were not members of the same stable orichimon.

Kōbōyama continued to fight in thejūryō division until November 1990, when he announced his retirement after demotion to the unsalariedmakushita division was certain. His top division record was 312 wins to 344 losses with 16 absences, a winning percentage of .453. He became anelder of theJapan Sumo Association, and re-established theTakashima stable in 1993. The stable closed in June 2011 when its only remaining wrestler retired, and Takashima moved toKasugayama stable to work as a coach there.^[3] After the closure of Kasugayama stable in October 2016 he moved briefly toOitekaze stable before transferring toMiyagino stable. He had remained close to Miyagino stable's head coach Chikubayama, who he had made his debut alongside, and he had introduced the Mongolian wrestlerRyuo to Miyagino stable after Ryuo was unable to join Takashima stable due to there already being a foreigner present (Fudoyama).

Takashima ran for a seat on the Sumo Association's board of directors in January 2016, but was unsuccessful.^[4] However, he was elected on the next occasion in January 2018. After serving for four years with two terms, he did not run for reelection in 2022, and reached the standard retirement age of 65 foroyakata in August of that year.^[5] He was re-hired as a consultant for a further five years, and in the same month he transferred toIsenoumi stable.

He liked pushing and thrusting techniques. Unusually, instead of favouring a right or left hand grip he specialised inmoro-zashi, or using two hands inside his opponent's arms to grab themawashi, and was fond of the rarekimarite or technique of tottari, the arm bar throw.^[1]

• List of sumo tournament top division runners-up
• List of past sumo wrestlers
• List of sumo elders
• List of sekiwake

• 1957 births
• Living people
• Japanese sumo wrestlers
• People from Kurihara, Miyagi
• Sumo people from Miyagi Prefecture
• Sekiwake

• CS1 Japanese-language sources (ja)
• Use dmy dates from October 2018