is a Japanese professional wrestler currently signed to the World Wonder Ring Stardom promotion. Since making her debut in January 2011, she became a one-time World of Stardom Champion, two-time Wonder of Stardom Champion, one-time High Speed Champion, one-time Goddess of Stardom Champion, and a four-time Artist of Stardom Champion, while also having won the 2015 and 2016 Cinderella Tournaments. She also makes appearances for Stardom's American partner Ring of Honor (ROH), where she is a former one-time Women of Honor World Champion . Dave Meltzer of the Wrestling Observer Newsletter has called Iwatani and fellow Japanese workers Io Shirai and Kairi Hojo "three of the best wrestlers in the world" On November 11, both Thunder Rock and Threedom were dissolved, when Shirai turned on Iwatani, after the two had lost to Hojo and Yoko Bito in the finals of the 2016 Goddesses of Stardom Tag League. This led to Iwatani unsuccessfully challenging Shirai for the World of Stardom Championship at Stardom's year-end show on December 22 The following day, the match was named Stardom's 2016 Match of the Year. Reportedly, Iwatani was originally scheduled to win the match and the World of Stardom Championship, but the result was changed after she told Stardom that she wanted to retire from professional wrestling in 2017 After nine successful title defenses, Iwatani lost the High Speed Championship to Kris Wolf in a three-way match, also involving Kagetsu, on February 23, 2017.On April 30, Iwatani made it to the finals of her third Cinderella Tournament in a row, but was this time defeated by Toni Storm.With Storm going after the World of Stardom Championship, Iwatani chose to challenge for the Wonder of Stardom Championship.On May 14, Iwatani defeated Kairi Hojo to win the Wonder of Stardom Championship for the second time.Shortly afterwards it was reported that Iwatani was no longer considering retirement and was being positioned as Stardom's top star in the wake of Io Shirai and Kairi Hojo's departures from the promotion.
On June 21, Iwatani defeated Shirai to win the World of Stardom Championship for the first time in her fifth challenge, becoming the first wrestler to simultaneously hold the World and Wonder of Stardom Championships. Afterwards, Iwatani started defending both the World and Wonder of Stardom Championships in separate title matches.On September 23, Iwatani lost the Wonder of Stardom Championship to Yoko Bito in her third defense. The following day, Iwatani lost the World of Stardom Championship to Toni Storm, again in her third defense.The title change was unplanned as the match had to be stopped after only two minutes due to Iwatani legitimately dislocating her elbow, forcing referee Daichi Murayama to award the title to Storm.Iwatani returned to the ring on December 10 to take part in Yoko Bito's final match in Shin-Kiba 1st Ring.
Ring of Honor (2017–present)
On December 15, Iwatani made her debut for American promotion Ring of Honor (ROH), when she was announced as part of a tournament to crown the inaugural Women of Honor Champion.At Bound By Honor, Iwatani challenged champion Kelly Klein to a title match, in which she defeated Klein for the title. Iwatani successfully defended the title twice before losing the title back to Klein at the G1 Supercard on April 6th, 2019