A former amateur champion at Toyo University, he made his professional debut in March 2015, reaching the top makuuchi division in November of the same year.

He has ten special prizes for Fighting Spirit, Technique and Outstanding Performance, as well two gold stars for defeating a yokozuna while ranked as a maegashira.

In his third year at Kiso Seihō High School he earned third place in the National Sports Festival junior sumo competition.

[12] Although Mitakeumi suffered his first loss as a professional sumo wrestler to Daishōhō in his second bout of the tournament, this helped relieve tension, and he was able to finish with a strong 6-1 winning record.

[20] Mitakeumi began the Hatsu tournament in January 2017 with a win over ōzeki Gōeidō, and on Day 2 he earned his first kinboshi (a yokozuna upset by a wrestler from the maegashira ranks) when he defeated Harumafuji.

Mitakeumi won his first eleven matches and appeared to have extended his run against the ōzeki Takayasu on day 12 but the referee's decision was overturned by the judges.

After a win over the ōzeki Gōeidō the following afternoon he clinched the title on day 14 with a yorikiri victory over Tochiōzan.

Interviewed immediately after the match he had difficulty responding to questions as he struggled to control his emotions and repeatedly broke down in tears.

[28] Despite losing to Yutakayama in his final match he was awarded the Emperor's Cup as champion as well as the special prizes for technique and outstanding performance.

"[29] He received plenty of local support as the Nagoya tournament is held close to his hometown of Agematsu.

[12] Despite speculation that Mitakeumi could be promoted to ōzeki with another good performance in September, he lost five bouts in a row from Days 8 to 12, and ended with only a 9–6 record.

He lost his sekiwake rank after a make-koshi 7–8 record in November, but began the January 2019 tournament with five straight wins before injuring his knee in a Day 6 defeat to Myōgiryū.

After Takakeishō defeated Okinoumi, Mitakeumi secured his place in a play-off for the title with a yorikiri win over Endō.

In the play-off Mitakeumi evaded Takakeishō's attempt at a pull-down, secured a double inside grip and quickly forced his rival over the bales to win his second top division championship and the Outstanding Performance Award as well.

[32] Mitakeumi needed a strong performance and record in the November 2019 basho to secure a promotion to ōzeki.

[40] In his customary acceptance speech, Mitakeumi said he would embrace gratitude, express his own style and devote himself to the way of sumo.

[40] Prior to his promotion Mitakeumi said, "I'm really happy that even people unfamiliar with sumo will hear the name Raiden.

[44] Mitakeumi was forced to withdraw on Day 7 of the July 2022 basho after another member of his stable tested positive for COVID-19.

[48] He could have made an immediate return to ōzeki had he secured at least ten wins in the November 2022 tournament, but this became impossible with his sixth defeat on Day 10.

Prior to this tournament, however, Mitakeumi learned of his father's death, forcing him to travel from Inuyama (Dewanoumi's training camp) to Kiso (Nagano Prefecture) to attend the funeral at his parents' home.

[54] Relegated to Maegashira 11, his lowest ranking since the March 2016 tournament, Mitakeumi competed in matches at the very start of his division, these usually serving as build-ups for the higher-ranked wrestlers.

[57] On the Day 8, he maintained his place one win behind the leading group with a victory over Shōnannoumi, both opponents falling from the dohyō at the end of the match and Mitakeumi showing signs of being unable to close his left knee.

[58] Mitakeumi prefers pushing and thrusting moves as opposed to fighting on the opponent's mawashi or belt.

[59] Mitakeumi emphasizes speed in his tachi-ai, and attempts to be the first wrestler in each match to take two steps toward his opponent rather than one.

He trains by unconventional methods, such as jumping rope and running uphill, to gain additional speed.

[62] 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