They debuted in 2007 and made a pretty good name for themselves in wrestling circles working for promotions like
Ibuki, Pro Wrestling Wave, Japanese Women Pro-Wrestling (JWP) Project, Sendai Girls' Pro Wrestling and a whole host of others.
In 2010, along with Kana, they formed the very popular Triple Tails stable.
And also in 2010, Mio and Io went to Mexico to work for Asistencia Asesoría y Administración (AAA), where they wrestled as Kaguya and Oyuki
In 2011, Io left the group to work on her singles career.
Mio Shirai and Io Shirai taking on Senri Kuroki and Yukari Ishino