Kannagi: Crazy Shrine Maidens (かんなぎ, Kannagi, lit. Shrine maiden), is a Japanese manga series written and illustrated by Eri Takenashi. The manga began serialization in the January 2006 issue of Ichijinsha's shōnen manga magazine Comic Rex and eight tankōbon volumes have been released in Japan. A 13-episode anime adaptation produced by A-1 Pictures aired between October and December 2008 in Japan. An original video animation (OVA) episode was released in May 2009. Bandai Entertainment licensed the manga and anime series, including the OVA.

An art student named Jin Mikuriya carves a statue from the wood of the Kannagi tree only to have the statue come to life in the form of a goddess, who has now taken over the statue. He and "Nagi" work together to destroy the impurities that are gathering in the town.