Izumo Province

During the early Kofun period (3rd century) this region was independent and constructed rectangular tumuli.

But in the fourth century this region saw the construction of rectangular and key shaped tumuli.

[2] During the 6th or 7th century it was absorbed due to the expansion of the state of Yamato,[3] within which it assumed the role of a sacerdotal domain.

[clarification needed] Today, the Izumo Shrine constitutes (as does the Grand Shrine of Ise) one of the most important sacred places of Shinto: it is dedicated to kami, especially to Ōkuninushi (Ō-kuni-nushi-no-mikoto), mythical progeny of Susanoo and all the clans of Izumo.

Hiba, at the border of the old provinces of Izumo and Hōki, near modern-day Yasugi of Shimane Prefecture.