He made his professional debut in March 2013, joining Tomozuna stable, and reached the jūryō division in September 2019.

[1] In his third year at Aichisangyodaigaku Mikawakoto High School he would rank second in the 100 kg weight division of the Aichi Prefectural tournament gaining him the nickname "Terminator of Mikawa".

[2] He would never compete in sumo before his debut, but was convinced by his cousin who had a connection with a Miyagino stable junior wrestler.

After being introduced to Asakayama oyakata, the former ōzeki Kaiō and a member of the same ichimon, Honda would choose to forego university in favor of joining Tomozuna stable.

Honda would make his debut in March 2013 alongside future sekitori Endō, Daishōhō, Takagenji, and Takanofuji.

After three straight kachi-koshi, or winning records in sandanme, Kaiseiō earned promotion to the makushita division for the May 2015 tournament.

In January 2018, Kaiseiō reverted back to his old shikona of Kaishō and immediately won all seven matches in sandanme.

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