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 on the story. The kabuki play, "Sumida-gawa — Gonichi no Omokage", is perhaps better known by the title "Hokaibo", which is the name of the central character. This stage drama was written by Nakawa Shimesuke, and it was first produced in Osaka in 1784. The play continues to be included in kabuki repertoire in Japan; and it is also performed in the West. It was recreated by the Heisei Nakamura-za in the Lincoln Center Festival in New York in the summer of 2007, with Nakamura Kanzaburō XVIII leading the cast. The Sumida River Fireworks, which are recognized as one of