In November 2015 he was appointed chairman of the Japan Sumo Association, following the death of Kitanoumi,[1] initially to serve until the end of March 2016.

An uncle was an acquaintance of former yokozuna Kitanofuji, who by then had retired from competition and was running Kokonoe stable, and at his invitation Hoshi moved to Tokyo.

In March 1986 at the sekiwake rank he won his first yūshō or tournament championship with a record of thirteen wins and two losses.

On the last day of the March 1990 tournament, he fought in a rare three-way play-off with ōzeki Konishiki and sekiwake Kirishima.

In October 1991 he was awarded the Japan Festival Trophy after winning an exhibition tournament at the Royal Albert Hall in London.

At the Nagoya Basho in July of the same year, a donation box was set up in the venue to support the areas affected by the heavy rains in northern Kyushu, and he said, "I hope it helps.

"[13] On his sixtieth birthday, on 22 June 2023, Hokutoumi declared his intention to perform a kanreki dohyō-iri at the Ryōgoku Kokugikan on 2 September of the same year.

The organisation of this training session in parallel with the 60th anniversary ceremony makes this kanreki dohyō-iri the first event of its kind to be free and open to the public.

[9] Hokutoumi also announced his choice of attendants for the event, in the person of his two students, Okinoumi, as tachimochi (sword-bearer), and Hokutofuji as tsuyuharai (dew sweeper).

[14] For the event Hokutoumi also chose to wear the keshō-mawashi set he wore during his first yokozuna dohyō-iri at the Meiji Shrine in 1987.

[9] On 23 August 2023 members of Hakkaku stable participated in the tsunauchi to create the red tsuna that Hokutoumi will wear for the ceremony.

[15] Hokutoumi's kanreki dohyō-iri was held on 2 September 2023 at the Ryōgoku Kokugikan in front of approximately 4,000 people who came to attend the Yokozuna Deliberation Council's training session.

"[16] Hokutoumi was primarily an oshi-sumo specialist, preferring pushing and thrusting techniques that got his opponents out of the ring as quickly as possible.

He said in an interview with Channel 4 television that the technique he most enjoyed was tsuri-dashi or lift out, although he was only credited with this kimarite once in official tournament competition (against Terao in November 1989).

[18] Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi