Nasu (那須郡, Nasu-gun) is a district located in Tochigi Prefecture, Japan.[1] The district consists of the two discontiguous towns of Nasu and Nakagawa,[2] separated by the city of Ōtawara in the middle.[3]
The total area of the district was 1,209.59 km2[citation needed] before the former constituent towns of Nishinasuno, and Shiobara were consolidated with Kuroiso to form the new city of Nasushiobara on January 1, 2005.[4] In 2003, the district had an estimated population of 154,881 and a density of 128.04 persons per km2.[citation needed]