Masuiyama Daishirō (16 November 1948 – 15 June 2025) was a Japanese sumo wrestler and coach from Hyōgo. In 1980, he became the oldest wrestler to be promoted to the rank of ōzeki in the modern era (since 1958). After retiring from active competition in 1981 he became a sumo coach and an elder of the Japan Sumo Association under the name Mihogaseki and produced several top-division wrestlers as head of Mihogaseki stable. In 2013, he stepping down from the stable at age 65. He was also an enka musician.
Source: “Masuiyama Daishirō II”, English Wikipedia (CC BY-SA 4.0), excerpt
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