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
Japanese gunboat Sumida (1939) damaged the same day in an air raid, which killed her captain and 11 crewmen. After repairs at Shanghai, she was again assigned to patrols of the lower Yangtze from 19 August 1942, and the middle Yangtze from 1 September 1943. On 22 June 1944, a flight of twenty USAAF B-24 Liberators attached to the Fourteenth Air Force bombed the docks at Hankou, damaging " Sumida" and killing eight crewmen. She was again damaged in another air raid on 25 November. After the surrender of Japan, "Sumida" was given to the Republic of China as a prize of war, and