1957 (May 3): Chichibu City absorbs Takajo and Ota villages. 1958 (May 31): Chichibu City absorbed Kagemori town. 1969: Seibu Railway Seibu Chichibu Line was opened. 1972 (November 11): Nagatoro created by renaming the town of Nogami. 1984 (October 1): The village of Yokoze gained town status. 2005 (April 1): Chichibu City absorbs Yoshida and the villages of Arakawa and Ōtaki 2005 (October 1): Ogano absorbs the village of Ryōkami Municipalities Chichibu District has five municipalities: Minano Nagatoro Ogano Yokoze Higashichichibu References Further reading Districts in Saitama Prefecture