Io Shirai Masami Odate ( May 8 , 1990 ) is a female Japan ese wrestler better known by her ring name Io Shirai . Making her debut in March 2007 , Io spent several years working as a tag team wrestler , teaming with her older sister Mio , with whom she would wrestle for various promotions across Japan and Mexico , winning the TLW World Young Women ' s Tag Team Championship in the process . In June 2010 , the Shirai sisters came together with fellow freelance wrestler , Kana to form the Triple Tails stable . The group lasted for fifteen months , before Io left an embarked on a singles career with the World Wonder Ring Stardom promotion . In April 2013 , she won the promotion ' s top title , the World of Stardom Championship . Career History . Team Makehen ( 2007 – 2010 ) . Odate made her professional wrestling debut on March 4 , 2007 , alongside her older sister , with the two adopting the ring names Io and Mio Shirai , respectively ( " Shirai " being Japanese for " Purple Thunder " ) . In their debut match , the Shirai sisters teamed with Toshie Uematsu to face the trio of Erika Ura , Nozomi Takesako and Yuri Urai . Starting their careers as freelancers , the Shirai sisters represented Team Makehen , a stable made up of wrestlers trained by Tomohiko Hashimoto , in several independent promotions during their first year in the business , including Ibuki , Pro Wrestling Wave , JWP Joshi Puroresu , and Sendai Girls ' Pro Wrestling . On October 19 , 2008 , Io and Mio made their debuts for one of Japan ' s largest professional wrestling promotions , All Japan Pro Wrestling ( AJPW ) , wrestling in a match , where they defeated the team of Kyoko Kimura and Mikado . From January to March 2009 , the Shirai sisters also made several appearances for another large promotion not usually known for female wrestling , Pro Wrestling Zero1 . On April 29 , the Shirai sisters won their first championship by defeating Moeka Haruhi and Tomoka Nakagawa in a tournament final to become the first Totally Lethal Wrestling TLW World Young Women ' s Tag Team Champions , a championship that , despite its name , was owned and promoted by Pro Wrestling Wave . On July 12 , Io received her first singles title opportunity , when she unsuccessfully challenged Misaki Ohata for the JWP Junior Championship and Princess of Pro - Wrestling Championship at Ibuki 30 . From July to November of that year , Io spent time working for the Ice Ribbon promotion along with her sister . On November 12 , 2009 , the Shirais entered Pro Wrestling Wave ' s Captain ' s Fall Six Person Tag Team Tournament , teaming with Gami , but the trio was defeated in their first round match by the team of Ran Yu - Yu , Ryo Mizunami and Toshie Uematsu . Later that same day Shirai ' s team was able to earn their way back into the tournament by defeating Misaki Ohata , Moeka Haruhi and Yumi Ohka in a consolation match . On November 25 , the Shirai sisters and Gami first defeated Bullfight Sora , Cherry and Kaoru in the semifinals and then Ayumi Kurihara , Kana and Shuu Shibutani in the finals to win the tournament , with Io , as the captain , scoring the deciding pinfall over Shibutani . On December 23 , the Io and Mio lost the TLW World Young Women ' s Tag Team Championship to Misaki Ohata and Moeka Haruhi . On May 30 , 2010 , Io entered the 2010 Catch the Wave tournament . After three wins and one loss , Shirai finished tied at the top of her block , but was eliminated from the tournament , after being defeated in a tiebreaker match by Ryo Mizunami on August 10 . Triple Tails ( 2010 – 2011 ) . On June 19 , 2010 , the Shirai sisters formed the Triple Tails stable with fellow freelancer wrestler , Kana . The trio defeated Ayumi Kurihara , Hikaru Shida and Yoshiko Tamura in their first match together at a NEO Japan Ladies Pro Wrestling event . As a result of this victory , the Shirai sisters received a shot at Kurihara ' s and Tamura ' s NEO Tag Team Championship on July 4 , but were defeated by the defending champions . On August 1 , Io teamed with Kana for another shot at title , but they were once again defeated by Kurihara and Tamura . Triple Tails returned to its winning ways on August 29 , by defeating Asami Kawasaki , Hikaru Shida and Nagisa Nozaki in a six - woman tag team match . On December 19 , Triple Tails made its debut as a unit for Pro Wrestling Wave , defeating Cherry , Gami and Tomoka Nakagawa in a six - woman tag team main event . On January 29 , 2011 , the Shirai sisters made their debut in SMASH , when the Triple Tails stable attacked Yusuke Kodama and Makoto after their matches , with the trio being chased out of the ring by Tajiri after both incidents . On February 13 , Triple Tails held its first self - produced event , during which the Shirai sisters wrestled the male tag team Momo no Seishun Tag ( Atsushi Kotoge and Daisuke Harada ) in a losing effort . On February 25 , the Shirais made their in - ring debuts at SMASH 14 , where they teamed with Kana to defeat Ken Ohka , Tajiri and Yoshiaki Yago in an intergender six person tag team match . In March , Triple Tails took part in Osaka Pro Wrestling ' s Spring Samba Series , going undefeated in six person tag team matches for the duration of the tour . On April 30 at SMASH 16 , Triple Tails was defeated in a six - woman tag team match by Makoto , Serena and Syuri . At SMASH 17 , the Shirai sisters were defeated in a tag team match by Hikaru Shida and Syuri . Triple Tails ' second event took place on May 8 and saw Io , Mio and Kana defeat Akino , Kagetsu and Syuri in a main event six woman tag team match . On July 23 , Triple Tails held a press conference to announce that , following the group ' s third self - produced event on September 18 , Io was leaving the stable in order to pursue a singles career . On August 21 , Triple Tails made its debut for Oz Academy , defeating the trio of Ayumi Kurihara , Hiren and Yumi Ohka . On September 14 , Triple Tails defeated Cherry , Moeka Haruhi and Shuu Shibutani in the group ' s final Pro Wrestling Wave appearance . Four days later , Triple Tails defeated Dash Chisako , Ryo Mizunami and Sendai Sachiko at their third self - produced event in the group ' s final appearance together . Mexico ( 2010 – 2012 , 2014 ) . On October 14 , 2010 , Shirai , working under the ring name Biba Kasai , made her debut for International Wrestling Revolution Group ( IWRG ) at an event in Naucalpan , Mexico , where she teamed with Mini Abismo Negro , Monster Clown and Yuriko to defeat El Hijo de Cien Caras , Mari Apache , Mascarita Divina and Pasión Cristal via disqualification in an eight - person tag team match . In Mexico , both Shirais worked under cat - like masks they would only wear for their entrances in Japan . On October 31 , both of the Shirai sisters were brought over to Asistencia Asesoría y Administración ( AAA ) , which had a working relationship with IWRG , and repackaged , with Io adopting the ring name Oyuki and Mio becoming Kaguya . In their first AAA match , Oyuki and Kaguya teamed with Yuriko in a six - person tag team match , where they were defeated by Cynthia Moreno , Gato Eveready and Mari Apache . During their stay in AAA , Oyuki and Kaguya became associates of the La Legión Extranjera ( Foreign Legion ) stable . On November 7 , Oyuki and Kaguya defeated Faby and Mari Apache in a tag team match and afterwards stole Faby ' s AAA World Mixed Tag Team Championship and Mari ' s AAA Reina de Reinas Championship belts . On November 15 , the Apaches and Cynthia Moreno defeated Oyuki , Kaguya and Sexy Star in a six - woman tag team match . A week later , Oyuki , Kaguya and Jennifer Blake defeated Moreno and the Apaches in another six woman tag team match . This would turn out to be Oyuki ' s and Kaguya ' s final AAA appearance , which resulted in the storyline with the Apaches being dropped without a conclusion . Shirai , now working without her mask and under the ring name Io Shirai , returned to Mexico on May 15 , 2011 , at Lucha Fan Fest 4 , where she teamed with Nosawa to defeat Chica Tormenta and Mike Segura for the vacant Americas World Mixed Tag Team Championship . In November 2011 , Shirai returned to Mexico with Wrestling All - Star Pros ( WASP ) for another two - week tour . On November 1 , Shirai put her hair on the line in her first Lucha de Apuestas Hair vs . Mask match , a four - way elimination match , where she faced Ángel o Demonio , La Maléfica and Shitara . Eventually , the match came down to Shirai and La Maléfica , ending with Shirai submitting her opponent for the win , forcing her to unmask herself . Shirai and Nosawa defended the Americas World Mixed Tag Team Championship back in Japan on January 3 , 2012 , defeating Ken Ohka and Mio Shirai at an Union Pro event . Shirai returned to Mexico on May 19 , 2012 , to take part in Lucha Expo in Mexico City , where she teamed with Keira to defeat Chica Tormenta and La Vaquerita in a tag team match . Upon Shirai ' s return to Japan , she was arrested under suspicion of marijuana smuggling . This resulted in a two - year break from her regular trips to Mexico , before , on January 27 , 2014 , Shirai announced that she would return to wrestle in the country the following May .