The Kanto Plain surrounds the city of Tokyo. It is the largest plain in Japan and was, when it was fully developed in the Edo period, the richest agricultural area. During the Edo period when agriculture was the strongest part of the economy, this gave the rulers of the Kanto Plain far more wealth and power than any other feudal lords. In the industrial period, the Kanto Plain with its large cities of Tokyo, Yokohama, Kawasaki and Chiba has been the center of urban and industrial growth.
