The New Student's Reference Work/Yezo

Yez′o or Yes′so, the most northerly of the four principal islands which compose the empire of Japan. It is known also as Hokkaido. This island is mountainous and has volcanoes; it is rich in fine timber and valuable minerals, especially coal; and the rivers and coasts abound in fish. Area of Yesso or Yezo 36,299 square miles. Population 1,137,455.