Tōdai-sha, Shinto shrine in Tonosho, Chiba, Japan

Tōdai-sha is a Shinto shrine in Tonosho, Chiba Prefecture, with a main hall (honden) rebuilt in 1826 and a worship hall (haiden) rebuilt in 1827. It enshrines Tamayori-hime no Mikoto as the main deity, with Ugayafukiaezu no Mikoto also worshipped. The shrine stands in a wooded setting and is reached by a 30-minute walk from Shimōsa-Tachibana Station on the JR Narita Line.

According to tradition, the shrine began when Emperor Keikō, touring the eastern provinces, ordered Haruomi no Mikoto to build a sanctuary for Tamayori-hime, guardian of the eastern sea. In 1102 Emperor Horikawa granted it the title Sōsha Tamago Daimyōjin, and in 1454 Emperor Go-Hanazono presented a calligraphic plaque. Minamoto no Yoritomo donated a mikuriya in 1184 and Tokugawa Ieyasu 10 koku of shrine land in 1591. The present honden was rebuilt in 1826 and the haiden in 1827.

Every 20 years since 1102, the shrine holds a shikinen shinkōsai in which the mikoshi travels six ri to the sea at Kōjin-no-ura in Chōshi, preceded and followed by the mikoshi of Raiden Shrine and Toyotama-hime Shrine. Participants from the former 33 villages of Tōsō accompany it in period costume, and on 20 October the autumn festival features a yabusame archery rite on horseback.

Wear modest clothing, wash your hands and mouth at the purification fountain before entering, and walk respectfully through the space. Photography inside may be restricted, so visitors often carry cash for small offerings and donations rather than taking pictures.

Every 20 years since 1102, the shrine holds a shikinen shinkō-sai, a procession in which the mikoshi of Raiden Shrine and Toyotama-hime Shrine flank Tōdai-sha's own, and worshippers from the former 33 villages of Tōsō accompany it in period costume. The mikoshi is carried six ri to the sea at Takagami-no-ura in Chōshi, greeted by roadside crowds along the way.