高砂部屋
Mitoizumi's official retirement ceremony ("danpatsu-shiki") took place on 9 June 2001, with a record 470 patrons, wrestlers and coaches taking part in the hair-cutting ritual. He remained in the sumo world as a coach at Takasago stable under the elder name Nishikido Oyakata and he effectively led it during the illness of its head, former "komusubi" Fujinishiki. However, he lost out on the chance to succeed him, due to personal problems with his fianceé from whom he eventually split. Instead, control of Takasago stable passed to former "ōzeki" Asashio who merged it with Wakamatsu stable. As a result, in December 2002 Mitoizumi instead opened up his own training stable, or "heya", Nishikido stable. The stable did not produce a "sekitori" until November 2017 when Mitoryū was promoted to "jūryō". Unusually for the head of a stable, he remained single for many years, before marrying a soprano, Yukiko Ono, in February 2016. Nishikido also works as a judge of tournament bouts.