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.
The Isthmus of Kra is located in the Malay Peninsula. It lies between the Ranong and Chumphon provinces of Southern Thailand. It is bordered by the Gulf of Thailand in the east and the Andaman Sea in the west.