Career
He began his professional career in 1960, reaching the top division in 1965. His highest rank was sekiwake. He retired in 1976 and became an elder of the Japan Sumo Association, working as a coach at Sadogatake stable until his retirement in 2009.
Hasegawa joined professional sumo in March 1960 at the age of 15, recruited by the former sekiwake Kotonishiki.
Unusually, he fought under his own surname for his entire career (he is the only top division wrestler from Sadogatake stable not to have adopted a shikona or fighting name with the prefix "Koto"). He made the jūryō division in January 1963 and was promoted to the top makuuchi division two years later in January 1965.
Hasegawa quickly rose up the ranks, defeating his first yokozuna (Tochinoumi) in September 1965 and earning his first special prize, for Technique. In the following tournament in November he made his debut in the titled san"yaku ranks at komusubi.
He was runner-up to yokozuna Taihō in the May 1967 tournament.
He reached sekiwake for the first time in January 1969 and held the rank for eight straight tournaments. However, as there were already four ōzeki at that time he was not promoted to sumo"s second highest rank. Managing only eight wins in the following tournament in May, he never became an ōzeki.
He was a sekiwake for 21 tournaments, a record for the modern era which stood until 2007 when it was broken by Kotomitsuki.
His last appearance at sekiwake was in January 1974. After this tournament he changed the second part of his shikona from Katsutoshi to Katsuhiro but it did not bring a change of luck and he remained largely in the maegashira ranks.
Hasegawa retired in May 1976, but remained in the sumo world as an elder, with the name Hidenoyama Oyakata. Until 2008 he was a Director of the Japan Sumo Association, responsible for the running of the annual honbasho held in Nagoya.
He then worked at Special Executive level
He reached the mandatory retirement age of 65 in July 2009. Hasegawa"s favoured techniques were hidari-yotsu (a right hand outside, left hand inside grip on the opponent"s mawashi), sukuinage (scoop throw), and yorikiri (force out).