Tokyo Broadcasting System Television
The first season, produced in 2007, was entitled . It was produced by Aniplex, Tokyo Broadcasting System Television, Kodansha, Movic, Mainichi Broadcasting System, and A-1 Pictures and directed by Tsutomu Mizushima. It was released in English by Funimation under the title "Big Windup! – Oofuri". The series contains 25 episodes which aired between April 12 and September 27 on a number of Japanese television networks including TBS, MBS, BS-i, and CBC. An additional special episode based on the one-shot "The Basic of the Basics" was only included in the 9th volume of the DVDs.