Ama was part of the former Owari Province, which formed the holdings of the Owari Tokugawa of Nagoya in the Edo period. During the Meiji period, the area was organized into several villages under Ama District, Aichi Prefecture. From the Meiji period, the area was a center for Cloisonné production. Jimokuji was elevated to town status on October 1, 1933, Miwa in 1958 and Shippō in 1966. The three towns, plus the town of Ōharu began merger discussions in 2008; however, an agreement could not be made with Ōharu, which left the discussions later that year. The remaining three towns passed a referendum in 2009, and the new city of Ama was created on March 22, 2010.