日本的大豆消费量年年都有增加,1060年是162万吨,1970年是330万吨,到1978年时突破了400万吨,1982年达到446万吨。而另一方面,大豆的生产却连连减少,最高仅为1952年的52万吨。1970～1977年生产量为11～13万吨,自给率下降到3～4％,而自1978年,由于水田改成轮作制后,到1982年生产量为23万吨,自给率又恢复到5％。 大豆的用途有:制油用约占80％,作食品用如豆腐,豆酱,豆豉等约低于20％。日本产的大豆中宜作食用的优良品种较多。由于大豆消费量极高,日本政府为了制止发生象1973年的豆腐骚动混乱,对应于水稻生产的调整,计划扩大其食用大豆的生产。在以1990年为目标年的农产品需要量和生产的长期预测中,大豆生产量为42万吨,其中食用大豆 Japan’s soybean consumption has increased every year, from 1.62 million tons in 1060 to 3.3 million tons in 1970, reaching 4 million tons in 1978 and 4.46 million tons in 1982. On the other hand, the production of soybeans has been reduced continuously, up to a maximum of 520,000 tons in 1952. From 1970 to 1977, the production volume was 110,000 to 130,000 tons and the self-sufficiency rate dropped to 3 to 4%. Since the paddy field was transformed into a rotation system in 1978, the production volume reached 230,000 tons in 1982 and the self-sufficiency rate returned to 5% . The use of soybeans are: oil-making with about 80% for foods such as tofu, bean paste, soy sauce, about less than 20%. Japanese-made soybeans should be made for eating more good varieties. Due to the extremely high consumption of soybeans, the Japanese government plans to expand its production of edible soybeans in response to the tumultuous turmoil of 1973 as a result of the tweaks in rice production. In the long-term forecast of agricultural demand and production in 1990 as the target year, soybean production was 420 000 tonnes, of which consumption of soybeans