Kazo is a city located in Saitama Prefecture, Japan. As of 1 January 2021, the city had an estimated population of 112,792 in 48,213 household…Kazo is a city located in Saitama Prefecture, Japan. As of 1 January 2021, the city had an estimated population of 112,792 in 48,213 households and a population density of 850 persons per km². The total area of the city is 133.30 square kilometres. The city is noted for is known throughout Japan for the creation of koinobori, baseballs, kendo equipment, and Kazo-udon noodles.