Gate Keepers

Gate Keepers (ゲートキーパーズ, Gēto Kīpāzu) is an anime television series directed by Junichi Sato and Koichi Chigara and produced by GONZO. It is based on the video game of the same name. The anime aired in Japan from April 3, 2000 to September 18, 2000 on cable network WOWOW. Geneon Entertainment licensed the anime and released it on home video from 2001 to 2002.