Base Ball Bear (ベースボールベアー) is a Japanese rock band from Tokyo that formally began in 2002, although the members assembled in the autumn of 2001. The band, which was initially named Planet, was formed for a one-time performance at a high school culture festival, but they decided to continue playing due to how well they were received at the festival and how much fun they were having. Base Ball Bear made its major debut in early 2006 with EMI Music Japan.