Saitama (city) city boundaries. The western portion of the city lies on the lowland created by the Arakawa River along with those created by small rivers such as the Moto-Arakawa River, Shiba River, and Ayase River. The rest of the area mostly resides on the Ōmiya Plateau lying in the north-south direction. Dispersed in this region, major rivers flow southward, almost paralleling to one another. Saitama has ten wards ("ku"), which were assigned official colours as of April 2005: Saitama's economy is principally constituted by commercial business. The city is one of many commercial centers of the Greater Tokyo area and serves
Sumida River Ryosai I and his son Inoue Ryosai II. In the late 1890s, Ryosai I developed a style of applied figures on a surface with flowing glaze, based on Chinese glazes called "flambe." Sumida pieces could be teapots, ash trays, or vases, and were made for export to the West. Inoue Ryosai III, grandson of Ryosai I, moved the manufacturing site to Yokohama in 1924, but the pieces continued to be identified as Sumida ware. The pottery has been subject to various myths, such as being manufactured on the make-believe island of Poo, which was washed away by a typhoon, or