The Sanno Matsuri Festival is one of Japan's Big Three Festivals and one of Tokyo's Big Three Festivals held in mid-June during several days.

The main highlight is the Jinko-sai Procession held every two years. The 600-meter long procession consists of about 500 people parading through central Tokyo near the National Diet, Imperial Palace, Tokyo Station, and Ginza. It includes three portable shrines, carriages, and flower floats. Various events are also held at Hie Shrine which holds the festival. Jinko-sai Procession left Hie Shrine at 8 am on June 11, 2004. Before noon, they approach the Imperial Palace. 山王まつり神幸祭