After the father and sons of the Shido-Shogun (Four Warriors) went their different ways and brought peace to the Tohoku area, they were reunited here in the Aizu area. This legend is the derivation of the name 'Aizu (where rivers meet)'. During this time, the Shido-Shogun humbly enshrined Izanaginomikoto and Izanaminomikoto, the gods of peace for the nation and endeavor for the nation, at this site on Mt Onkagura near the border of Niigata Prefecture.

These are the legendary origins of Isasumi Shrine. Soon after, in 522, the enshrined gods were first moved respectfully to Mt Hakase, then to Mt Myojingatake, and finally to the Takadaminamibara area. In 560, a shrine was built in the current location of Higashibara.

In the 1,400 years that have passed since then, Isasumi Shrine has become one of the most prestigious shrines of the Aizu area, with the rank of Iwashironokuni-ichinomiya-Aizusouchinnshu. National and Prefectural Significant Cultural Assets such as the Shuurushikonndousoushinyo and the Wooden Koma-inu Statue are kept there.

The shrine is held in respect not only from within the prefecture but from outside, too, as a guardian of industry and culture, longevity and traffic safety. The Shido-Shogun legend tells the story of the initiation of farming techniques and leading cultures, proving that this is the origin of the distinct Aizu culture.