Chūkyō , or the Chūkyō region , is a major metropolitan area in Japan that is centered on the city of Nagoya in Aichi Prefecture. The area makes up the most urbanized part of the Tōkai region. The population of 10,110,000 over an area of 7,072 square kilometers. Nevertheless, like most of Japan's major metro areas, the core of it lies on a fertile alluvial plain, in this case, the Nōbi Plain.

Nagoya is the largest city in the Chūbu region, the fourth-most populous city proper with a population of 2.3 million in 2020, and the principal city of the Chūkyō metropolitan area, which is the third-most populous metropolitan area in Japan with a population of 10.11 million. Located on the Pacific coast in central Honshu, it is the capital and most populous city of Aichi Prefecture, with the Port of Nagoya being Japan's largest seaport.