Nobi and Kanto plains are located in which of the following countries ?

The Kanto Plain and Nobi Plain are both located in Japan on the island of Honshu.

• Kanto Plain: It is the largest plain in Japan, situated in the Kanto region of central Honshu. It encompasses the Tokyo-Yokohama metropolitan area and is the most densely populated and industrialized part of the country.
• Nobi Plain: It is a large alluvial plain located in the Chubu region, surrounding the city of Nagoya. It is formed by the Kiso, Ibi, and Nagara rivers (the Three Kiso Rivers).

Due to Japan's predominantly mountainous terrain, these flat coastal plains are of immense economic importance, supporting the bulk of the nation's agriculture, industry, and urban population centers.