713 - Nitori District (丹取郡) was established. In 728 it was changed to Tamatsukuri.
1871 - With the
Abolition of the han system, Tamakatsuri District becomes Ichinoseki Prefecture (一関県). That same year, it is renamed Mizusawa Prefecture (水沢県)
1889 - With the establishment of the municipal system, the Town of Iwadeyama (岩出山町) and the villages of Ōsaki (大崎村), Ichikuri (一栗村), Mayama (真山村), Onsen (温泉村), and Onikōbe (鬼首村) are established
1894 - District office is established in Iwadeyama
1921 - Onsen Village divided, becoming Naruko Town (鳴子町) and Kawatabi Village (川渡村)
1926 - District offices eliminated
1954 - Naruko Town, Kawatabi Village, and Onikōbe Village merge to form new Naruko Town.
1954 - Iwadeyama Town, Ichikuri Village, Mayama Village and West Ōsaki Village merge to form new Iwadeyama Town