The regions of Japan are not official administrative units, but have been traditionally used as the regional division of Japan in a number of contexts: for example, maps and geography textbooks divide Japan into the eight regions, weather reports usually give the weather by region, and many businesses and institutions...
A district (郡; gun) was the administrative unit during the period from 1890 to 1923, which is roughly equivalent to the county of the United States, and was ranked at the level below prefecture and above city, town or village.
Mie (三重郡; -gun) is a district located in Mie, Japan.