His grandfather Wakabayama reached the rank of komusubi and his father, who was a makushita division wrestler, now owns a chankonabe restaurant in Fukushima.

[4] When the three brothers first entered professional sumo, they were given shikona, or ring names, inspired by the parable of the three arrows of 16th-century warlord Mōri Motonari.

[9] In his first official tournament (honbasho) in January 2012, under the new shikona Goshi (剛士), he won the jonokuchi championship, or yūshō, with a perfect 7–0 record.

[11] At the time of his first promotion to the jūryō division, he and Wakatakakage became the twentieth pair of brothers to achieve the status of sekitori in sumo history.

[14] In November 2019 he had to apologize after a picture of him bound to a chair and gagged with tape was posted on social media by fellow wrestler Abi.

[16] In December 2021 the Japan Sumo Association released the rankings for the January 2022 tournament, and he was promoted to the top makuuchi division, joining his younger brother Wakatakakage.

[18] He is the second member of Arashio stable to make the top division following Wakatakakage in November 2019, and the first since the current stablemaster, former maegashira Sōkokurai, took over.

[19] Speaking to reporters Wakamotoharu recalled the difficulty of beginning 2021 by having to sit out the January tournament because of a COVID-19 infection but ending it with his best result as a sekitori, an 11-4 record in November, which saw him win promotion.

[20] At the time of his promotion, the supporters' association in his hometown of Fukushima gave him a replica of the keshō-mawashi worn by his grandfather Wakabayama.

After a pause of about ten minutes for a mono-ii and to reset the positions of the wrestlers, Wakamotoharu was defeated when Terunofuji quickly swung him out of the ring with an underarm throw.

On Day 2 of the tournament, he claimed his very first kinboshi (gold star) with an upset victory over Yokozuna Terunofuji in a match lasting 1 minute and 42 seconds.

[40] He is a fan of singers Ed Sheeran and Aiko, professional wrestling, the comedy duo Chocolate Planet, and the Kinnikuman series.

[41] 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