The Azumi Basin (安曇野, Azumino) is part of the Matsumoto Basin in Nagano Prefecture, Japan. It covers approximately the municipalities of Azumino, Ikeda and Matsukawa, and some parts of Matsumoto and Ōmachi . Formerly called Azumidaira, it stretches from the west banks of the Azusa and Sai rivers to the foot of the Hida Mountains (also known as the Northern Alps) in the west, and towards the southernmost watershed of the Takase River.[1]: 11–12 It is known for its natural environment, museums and art galleries.[2]