Matsumoto Domain
The area of present-day Azumino was part of ancient Shinano Province. The area was part of the holdings of Matsumoto Domain during the Edo period. The modern city of Azumino was established on October 1, 2005 by the merger of the town of Akashina (from Higashichikuma District), the towns of Hotaka and Toyoshina, and the villages of Horigane and Misato (all from Minamiazumi District).