urbanized belt along the Pacific coast of Honshu is noted for its highly concentrated population, heavy industrialization, and environmental pollution.

Humans have occupied Japan for tens of thousands of years, but Japan’s recorded history begins only in the 1st century bce, with mention in Chinese sources. Contact with China and Korea in the early centuries ce brought profound changes to Japan, including the Chinese writing system, Buddhism, and many artistic forms from the continent. The first steps at political unification of the country occurred in the late 4th and early 5th centuries ce under the Yamato court. A great civilization then developed first at Nara in the 8th century and then at Heian-kyō (now Kyōto) from the late 8th to the late 12th century. The seven centuries thereafter werea period of domination by military rulers culminating in near isolation from the outside world from the early 17th to the mid-19th century.

The reopening of the country ushered in contact with the West and a time of unprecedented change. Japan sought to become a modern industrialized nation and pursued the acquisition of a large overseas empire, initially in Korea and China. By late 1941 this latter policy caused direct confrontation with the United States and its allies and to defeat in World War II (1939–45). Since the war, however, Japan’s spectacular economic growth—one of the greatest of any nation in that period—brought the country to the forefront of the world economy. It now is one of the world’s foremost manufacturing countries and traders of goods and is a