The central region of Honshu (Japan's main island), Chubu stretches northeast from Kansai across the Hida, Kiso, and Akaishi mountains known collectively as the Japan Alps to the plains of the north coast and the Sea of Japan.
The southern region of Chubu is known as Honshu.
mnli hypothesis: The southern region of Chubu is known as Honshu. premise: The central region of Honshu (Japan's main island), Chubu stretches northeast from Kansai across the Hida, Kiso, and Akaishi mountains known collectively as the Japan Alps to the plains of the north coast and the Sea of Japan.