Saiyuki Reload: Zeroin is a remake to Saiyuki Reload Gunlock and the fifth season of the Saiyuki anime television series adapted from the manga of Saiyuki Reload by Kazuya Minekura and produced by Liden Films.

Saiyuki Reload Gunlock is a sequel and the third season of the Saiyuki anime television series produced by Studio Pierrot. Adapted from the manga of Saiyuki Reload by Kazuya Minekura, the series is directed by Tetsuya Endo, written by Tetsuya Endo and composed by Daisuke Ikeda.