The community went through the following five steps

1. Formation of communities (early in the Yayoi period: 4th-2nd century B.C.)	People began to reside on small hills. North, south and west of the Site have the remains of communities.
2. Segregation of communities (in the earlier middle of the Yayoi period: 2nd century B.C.)	Moats were dug around each residential area and 'communities with circle moats' were formed. In the west, large structures were also built.
3. Integration of communities (in the middle of the Yayoi period: 2nd-1st century B.C.)	Three communities were integrated and 'large circle moat' was dug around the integrated community. The size is thought to be about 400 meters in diameter. Many ditches were drug around the moat. In the latter of this period, people began drawing pictures of buildings incl. towers, deer and human on the pottery.
4. Development period (late in the Yayoi period: 1st century B.C. - 2nd century A.D.)	Most of the moats were choked by a flood in the end of the above-mentioned period, but soon dug again. The width of moats was the largest ever. Early in this period, bronze tools were made in southern part of the community.
5. Declination period (early in the Kofun period: 3rd century A.D.)	The large moat disappeared and the size of the community became smaller. Only some parts of circle moats were dug again, but residential equipment such as wells decreased in number.
*After the fall of the communities (In and after the Kofun period: 5th century A.D. and after)	A burial mound built in the latter of the Kofun period which combines a circular and a square shape, was found in the center of the Site. The community had already disappeared by that time and the area became a graveyard. In the Middle Ages, large residential building of Karakoshi, Karakominamishi and Karakohigashishi, who were warriors of this area, were built in this area. The area around the Karakominamishi has been developed to the Kagi area of today.