Yaotsu is a town located in Kamo District, Gifu Prefecture, Japan. As of 1 January 2019, the town had an estimated population of 11,036 and a population density of 886 persons per km2, in 4311 households. The total area of the town was 128.79 square kilometres (49.73 sq mi).

Gifu Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Gifu Prefecture has a population of 1,991,390 and has a geographic area of 10,621 square kilometres (4,101 sq mi). Gifu Prefecture borders Toyama Prefecture to the north; Ishikawa Prefecture to the northwest, Fukui Prefecture and Shiga Prefecture to the west, Mie Prefecture to the southwest, Aichi Prefecture to the south, and Nagano Prefecture to the east.