Minuma

The area encompasses 1260 hectares and straddles across five wards of the city of Saitama (Kita-ku, Ōmiya-ku, Minuma-ku, Urawa-ku, and Midori-ku).

The area stands on the Shiba River Lowland, which is located inside of the Ōmiya Plateau in the central Kantō plain.

From the Jōmon to the early Edo period, the high sea level associated with the Holocene climatic optimum linked the region with Tokyo Bay and nearly two-thirds of the area occupied by the former city of Urawa was under water.

Subsequently, as the climate cooled down, the retracting shoreline left the region a countless number of marshlands and wetlands, resulting in the creation of Minuma.

In 1629, the project began with constructing a levee between current Tsukishima in Saitama and Kizoro in the city of Kawaguchi.