, is a Japanese animation studio founded in January 1986 by Tomoyuki Miyata, who previously worked at Tatsunoko Production. The studio's first release was Yotoden in 1987. They have produced several well-known anime series, such as Slayers, Revolutionary Girl Utena, Excel Saga, Shingetsutan Tsukihime, Shakugan no Shana, A Certain Magical Index, A Certain Scientific Railgun, Honey and Clover, Alien Nine, Azumanga Daioh, Toradora!, Zero No Tsukaima, Ikki Tousen, Sakurasou no Pet na Kanojo, and Betrayal Knows My Name. Since 2005, the majority of their works have been directed by Takashi Watanabe, Ken'ichi Kasai and Yoshiaki Iwasaki.