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 (51.47 sq mi). The city is noted for is known throughout Japan for the creation of koinobori, baseballs, kendo equipment, and Kazo-udon noodles.