Kaizu is a city located in Gifu, Japan. As of 1 April 2018, the city had an estimated population of 34,960, and a population density of 310 persons per km2, in 12,167 households. The total area of the city was 112.03 square kilometres (43.26 sq mi). Most of the city is located at sea level and is well known for levees surrounding the area.

Yōrō is a town located in Yōrō District, Gifu Prefecture, Japan. As of 1 April 2018, the town had an estimated population of 29,309 in 10,356 households and a population density of 405 persons per km2. The total area of the town was 72.29 square kilometres (27.91 sq mi).