Yotsukaidō is a city located in Chiba Prefecture, Japan. As of 1 November 2020, the city had an estimated population of 95,266 in 43,191 households and a population density of 2800 persons per km2. The total area of the city is 34.52 square kilometres (13.33 sq mi).

The Higashi-Kantō Expressway is a national expressway in Japan. It is owned and operated by East Nippon Expressway Company.