The Katori Shrine is a Shintō shrine in the city of Katori in Chiba Prefecture, Japan. It is the ichinomiya of former Shimōsa Province, and is the head shrine of the approximately 400 Katori shrines around the country. The main festival of the shrine is held annually on April 14, with a three-day Grand Festival held every 12 years.

Tenshin Shōden Katori Shintō-ryū (天真正伝香取神道流) is one of the oldest extant Japanese martial arts and an exemplar of bujutsu. It was founded by Iizasa Ienao, who lived near Katori Shrine at the time. The ryū is purported to have been founded in 1447, but some scholars state that it was about 1480.