Economy of Japan
The Japanese agricultural sector accounts for about 1.4% of the total country's GDP. Only 12% of Japan's land is suitable for cultivation. Due to this lack of arable land, a system of terraces is used to farm in small areas. This results in one of the world's highest levels of crop yields per unit area, with an overall agricultural self-sufficiency rate of about 50% on fewer than 56,000 km² (14 million acres) cultivated.
Trade policy of Japan
In general, Japan has not imported an unusually large amount as a share of its GNP, but it has been highly dependent on imports for a variety of critical raw materials. Japan has by no means been the only industrialized nation dependent on imported raw materials, but it has depended on imports for a wider variety of materials, and often for a higher share of its needs for these materials. The country imported, for example, 50% of its caloric intake of food and about 30% of the total value of food consumed in the late 1980s. It also depended on imports for about 85% of its total energy needs (including all of its petroleum and 89% of its coal) and nearly all of its iron, copper, lead, and nickel.