Katashina is a village located in Gunma Prefecture, Japan. As of 31 October 2020, the village had an estimated population of 4,314 in 1694 households, and a population density of 11 persons per km2. The total area of the village is 391.76 square kilometres (151.26 sq mi). m2. Much of the village is within the borders of Oze National Park.

Gunma Prefecture is a landlocked prefecture of Japan located in the Kantō region of Honshu. Gunma Prefecture has a population of 1,937,626 and has a geographic area of 6,362 km2. Gunma Prefecture borders Niigata Prefecture and Fukushima Prefecture to the north, Nagano Prefecture to the southwest, Saitama Prefecture to the south, and Tochigi Prefecture to the east.