The Shimōsa Plateau is a plateau on the Kantō Plain in central Honshu, Japan. The plateau covers most of northern Chiba Prefecture. The plateau was historically richly agricultural, but in the 20th century the western and central Shimōsa Plateau became one of the major industrial areas of Japan, as well as a large-scale bedroom community of the Tokyo Metropolitan Region. Narita International Airport is located in the center of the Shimōsa Plateau.

Narita is a city in Chiba Prefecture, Japan. As of 30 November 2020, the city had an estimated population of 131,852 in 63,098 households and a population density of 620 persons per km². The total area of the city is 213.84 square kilometres (82.56 sq mi). It is the site of Narita International Airport, one of the two main international airports serving the Greater Tokyo Area.