Izumo Grand Shrine

, officially Izumo Ōyashiro, is one of the most ancient and important Shinto shrines in Japan. No record gives the date of establishment. Located in Izumo, Shimane Prefecture, it hosts two major festivals. It is dedicated to the kami (god) , famous as the Shinto deity of marriage and to Kotoamatsukami, distinguishing heavenly kami. The shrine is widely regarded as the oldest Shinto shrine in Japan, predating the Ise Shrine.

{| style="border-collapse:collapse" cellpadding="0" |style="border:1px solid black;"|alt=Kamosu Jinja's honden|x220px |style="border:1px solid black;"|alt=A reconstructed dwelling at Toro|x220px |} Kamosu Jinja's honden and a granary at Toro is an ancient Japanese architectural style and the oldest Shinto shrine architectural style. Named after Izumo Taisha's honden (sanctuary), like Ise Grand Shrine's shinmei-zukuri style it features a bark roof decorated with poles called chigi and katsuogi, plus archaic features like gable-end pillars and a single central pillar (shin no mihashira). The '

type of Shinto Shrine

is a Japanese Shinto grouping. It was established by Senge Takatomi (1845–1918), the 80th head priest of Izumo-taisha in 1882, as one of the original thirteen sects of Kyoha Shintō Rengokai (Association of Sectarian Shinto), during the Meiji era in Shimane Prefecture.