In 2006, when Riho was only nine years old and still in elementary school, she and her older sister Seina began training professional wrestling under Emi Sakura at her Ice Ribbon dojo.

[18] For most of 2009, Riho was involved in a storyline rivalry with Chii Tomiya, which eventually led to the two forming the tag team Miniature Dachs in November.

[27] On May 3 at Golden Ribbon, Riho became the youngest person to ever main event a show in Korakuen Hall,[4] when she lost the ICE×60 Championship to Sakura in her first defense, ending her title reign at just 30 days.

[28] In January 2011, Riho came together with Ice Ribbon's younger wrestlers, including former associates Chii Tomiya and Hikari Minami, to form the Heisei YTR (Young Traditional Revolution) stable, under the leadership of Makoto.

[31] The following month, Riho and Minami began producing their own events under the banner of "Teens", which would focus on spotlighting Ice Ribbon's younger wrestlers.

[37][38] On December 25 at RibbonMania 2011, Seina returned to Ice Ribbon, after a two-year hiatus, to wrestle her retirement match against her Riho.

[39][40] In early 2012, Riho began teaming regularly with Hikari Minami, after the latter brought back the Teens concept, producing Teens4 on March 3.

[44] On May 24, Riho made her debut for Wrestling New Classic (WNC), the follow-up promotion to Smash, when she replaced an injured Mio Shirai in a tag team match, where she and Makoto were defeated by Kana and Syuri.

[59] After defending the Trios Triple Crown Championship against Jaki Numazawa, Jun Kasai and Miyako Matsumoto at an Ice Ribbon event on September 23, Riho, The Great Kojika and Mr. #6 lost the title to Hikaru Sato, Michael Nakazawa and Tomomitsu Matsunaga back in DDT on November 3.

[64][65] Riho made her in-ring debut for Gatoh Move on October 7 in Shinjuku, Tokyo, wrestling Emi Sakura to a ten-minute time limit draw.

[68] On May 4, Riho and Antonio Honda first defeated Choun Shiryu and Hiroyo Matsumoto in the semifinals and then Emi Sakura and Hikaru Sato in the finals to win the Go Go!

[72] On November 2, Riho defeated Sakura to win the IWA Triple Crown Championship, after which she announced she was entering the idol business.

[75] On August 13, Riho main evented Gatoh Move's first ever Korakuen Hall show, successfully defending the IWA Triple Crown Championship against Kotori.

[79] On December 24, Riho and Kotori defeated Aoi Kizuki and Sayaka Obihiro to win the Asia Dream Tag Team Championship.

[88] On August 31 at All Out, Riho defeated Hikaru Shida, advancing to face Nyla Rose on the October 2 episode of Dynamite to crown the inaugural AEW Women's World Champion.

[94] On the February 12 episode of Dynamite, Riho lost the AEW Women's World Championship to Rose, ending her reign at 133 days.

[95] After an 11-month hiatus due to travel restrictions resulting from the COVID-19 pandemic, it was announced in January 2021 that Riho would be returning to action and would be participating in the AEW Women's World Title Eliminator tournament.

On the February 17 episode of Dynamite, Riho defeated the NWA World Women's Champion Serena Deeb in the opening round in a non-title match.

[96][97] At the semi-finals of the American bracket, which aired on February 28 on B/R Live Riho lost to the former NWA World Women's Champion Thunder Rosa.

[103] On July 24, 2019, Riho made a surprise appearance on World Wonder Ring Stardom, announcing that she will wrestle for the company starting August.

[110] In late December, Dave Meltzer confirmed that Riho would no longer appear for the promotion due to AEW commitments.