The is a national expressway in Chiba Prefecture, Japan. It is owned and operated by East Nippon Expressway Company.
Tateyama refers to the city of the same name on the Bà Âsà  Peninsula, a major city in the region. Though the Tateyama Expressway does not actually reach the city proper, its extension the Futtsu Tateyama Road terminates at a point just beyond the city boundary in Minamibà Âsà  City.
Officially the expressway is referred to as the Higashi-Kantà  Expressway Tateyama Route and the Higashi-Kantà  Expressway Chiba Futtsu Route.
Together with the Keiyà  Road and Futtsu Tateyama Road, the expressway forms a link connecting the greater Tokyo area with southern Chiba Prefecture. The expressway has a junction with the Tokyo Bay Aqua-Line, creating the only direct road link connecting Chiba and Kanagawa Prefectures.
The first section of the expressway was opened to traffic in 1995 and the entire route was completed in 2007. The section from Kimitsu Interchange to Futtsu-Takeoka Interchange is 2 lanes, while the remainder is 4 lanes.