Sendai Girls' Pro Wrestling
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 Io sisters teamed with Toshie Uematsu to face the trio of Erika Ura, Nozomi Takesako and Yuri Urai. At the time of her debut, Io was only 16 years old, working part-time while attending high school. After graduating, she started working full-time as a professional wrestler. 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.