Koma clan

In 666, after a power struggle with his brothers or as refuge from Tang China's attack (opinion in dispute), he came to the old capital of Asuka in Japan during the reign of Emperor Tenji.

[4] In 716 A.D., Jakkō was instructed to gather the 1,799 Goguryeo refugees who initially came with him, from all over Japan and settle them in the wilderness of the Musashino Plain with a commanding view of the mountains (now known as Hidaka).

Built in Korea's shamanist tradition, the building took its present form when the Meiji government forced all worshipers to adopt state Shinto.

[6] The Koma District that was given to the Goguryeo people stretched from the foothills of the mountains throughout the vast flatlands of Musashino all the way to today's Sayama city.

After a few centuries following their arrival to Japan, horse-riding warriors started to emerge here and there with iron weaponry and armor in the Kanto area, which includes their settled district.

The enshrined deities are Koma no Koshiki Jakkō, Sarutahiko no Mikoto and Takenouchi no Sukune (a legendary statesman).