Io Shirai

 (born Masami Odate February 14, 1988) is a female Japanese wrestler. 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.