His father was a famous bökh and judo coach whose students included Asashōryū, Harumafuji, Asasekiryū, Tokitenku, Hakuba and Ryūō.

During his years at Kasugayama stable, Tamashōhō came close to winning the sandanme championship in March 2014, but failed in a playoff against Chiyoarashi.

However, in 2016, the new master of his stable, the 21st Kasugayama (former maegashira Hamanishiki), was ordered by the Japan Sumo Association to resign his position of stablemaster after a dispute over the acquisition of a coaching licence between him and his predecessor was settled in court.

In November 2017 he changed his shikona again and was renamed Kyokusōten (旭蒼天), after the first kanji of his master Nakagawa's former wrestling name and to evoke the colour of the Mongolian sky, which he likes.

[18] Tamashōhō's promotion to jūryō also posed a logistical problem, since a sekitori is supposed to have one or more tsukebito (assistant) depending on his rank and division.

Following a 10-win performance in the November 2024 tournament at the rank of jūryō 4, Tamashōhō earned a promotion to the top division (makuuchi) for the first time in his 13-year professional career.

He is also the slowest foreign-born competitor to be promoted to the top division, having done so in 79 tournaments, and well as the eighth oldest wrestler of any nationality to do so in the post-war era.

His stablemaster said that he did not expect Tamashōhō to be promoted, noting that he was lucky since two of his ten wins at the prior tournament came by default and foul.

[24][25] Sanshō key: F=Fighting spirit; O=Outstanding performance; T=Technique     Also shown: ★=Kinboshi; P=Playoff(s) Divisions: Makuuchi — Jūryō — Makushita — Sandanme — Jonidan — Jonokuchi Terunofuji (retired) Kotozakura Hōshōryū Ōnosato Wakamotoharu Daieishō Abi Wakatakakage Takanoshō Kirishima Tobizaru Atamifuji Gōnoyama Ōhō Shōdai Ura Hiradoumi Chiyoshōma Takayasu Ichiyamamoto Endō Mitakeumi Rōga Takarafuji Churanoumi Ōshōma Tamawashi Meisei Midorifuji Takerufuji Nishikigi Ōnokatsu Shōnannoumi Kotoshōhō Hokutofuji Kinbōzan Hakuōhō Kitanowaka Tamashōhō Kagayaki Nishikifuji Tokihayate