This is a nationally designated Historic Site. Discovered at this site is a village that operated throughout the early Jomon period and clusters of stone circles in which groups of individual stones were gathered together in donut-shaped rings. These clusters are estimated to contain 100,000 to 300,000 stones. Graves were dug inside these clusters, and in the open spaces in the center of the clusters stood 120-cm-high square-shaped stone pillars. These standing stones and the straight lines of stones leading out from them formed a large-scale place for religious worship. The standing stones that symbolized the place of religious worship were made to look as if they were bowing to Mt. Tateshina, and from the traces of burnt soil that have been found, it is believed that the religious practices performed there involved the use of fire.
The village at the Akyu Site was a prototype for the Jomon culture that flourished in the Central Highlands in the middle Jomon period. This is an important site as it gives us an insight into various elements of Jomon society, such as the process by which a village would change from a place of residence to a place of religious worship as the number of dwellings decreased over time, as well as burial systems and rituals.