was a town located in Ōsato District, Saitama, Japan. As of 2003, the town had an estimated population of 13,826 and a density of 605.08 persons per km². The total area is 22.34 km². On February 13, 2007, Kōnan was merged into the expanded city of Kumagaya and no longer exists as an independent municipality. Dissolved municipalities of Saitama Prefecture Kumagaya