Yoko Arai (新井 陽子, Arai Yōko, born December 13, 1986) is a Japanese retired professional wrestler better known by the ring name Yoko Bito (美闘 陽子, Bitō Yōko). Bito initially made her in-ring debut in December 2010 for World Wonder Ring Stardom and quickly became one of the most popular wrestlers in the promotion, until announcing her retirement from in-ring competition in November 2012. Bito came out of retirement and returned to Stardom in April 2016, and returned to the ring in June of that year, before retiring again in December 2017.