April 1, 1889 - Due to the municipal status enforcement, the following municipalities were formed. (1 town, 12 villages)
The town of Iwayadō, the villages of Tawara, Fujisato, Ide, Yonesato, Tamasato, Yanagawa, Hirose, Inase, Odaki, Kuroishi and Hada (now part of the city of Ōshū)
The village of Fukuoka (now part of the city of Kitakami)
November 3, 1958 - The town of Esashi was elevated to city status to become the city of Esashi. Esashi District was dissolved as a result of this merger.