Kaiketsu Masateru (Teriyuki Nishimori)

Career and roles

After leaving the dohyo as an active competitor, Kaiketsu transitioned to the traditional post-competition role of elder and coach within the sumo world. Former wrestlers commonly take an elder name and work to train younger rikishi, manage stables, and contribute to the governance structures of the sumo community. Kaiketsu’s administrative contributions culminated in his election as chairman of the Japan Sumo Association, a post he held from 2010 to 2012, during which he was involved in overseeing tournament organization, wrestler welfare, and public relations.

Achievements and significance

Winning two top-division tournaments is an indicator of sustained high performance in professional sumo, where each honbasho is contested over 15 days and success is measured by win–loss records and consistency. Kaiketsu’s championships placed him among the notable rikishi of his era and provided a platform for his later work as a mentor and official. His career is often cited when discussing athletes who successfully moved into leadership roles within the sport.

Legacy and death

Kaiketsu remained involved in sumo administration and coaching until later in life, contributing to training and organizational matters common to retired top-division wrestlers. He died on May 18, 2014, at the age of 66 while practicing golf in Tokyo. The reported cause was heart disease. His passing prompted reflections in the sumo community on his dual legacy as both a competitor and an executive.

Key facts

• Birth name: Teriyuki Nishimori (February 16, 1948)
• Ring name: Kaiketsu Masateru
• Top-division championships: 2
• Retired from competition: 1979
• Chairman, Japan Sumo Association: 2010–2012
• Death: May 18, 2014 (age 66); heart disease while practicing golf

For readers unfamiliar with sumo terminology: the sport’s professional structure includes ranked divisions culminating in the makuuchi (top division), frequent official tournaments, and a distinctive post-retirement system in which experienced wrestlers often become coaches or association officials. Kaiketsu’s life followed that common pathway from on-dohyō success to off-dohyō stewardship, making him a representative figure of modern sumo’s athletic and institutional traditions.