is a district located in Nagano Prefecture, Japan.
As of 2003, the district has an estimated population of 7,643 with a density of 24.96 persons per km<sup>2</sup>. The total area is 306.25 km<sup>2</sup>.
Municipalities
The district consists of one village:
- Sakae
History
thumb|320px|right|Map showing original extent of Shimominochi District in [[Nagano Prefecture:<br /><br />* yellow - areas formerly within the district borders during the early Meiji period<br /> ]]
260px|thumb|right|Colored areas are in this district.
District Timeline
Recent mergers
- On April 1, 2005 - The village of Toyota was merged into the expanded city of Nakano.