The Kanto Plain is the largest plain in Japan. It is in the Kanto Region of central Honshu. The plain covers an area of 17000 sq.km. Large number of plateaus form a part of this plain.
An isohyet or an isohyetal line is a line that joins places of same rainfall on a map within a given time period. A map of isohyets is also known as an isohyetal map.