Soybeans originate from China. In 2853 BC, Emperor Sheng-Nung of China named five sacred plants - soybeans, rice, wheat, barley, and millet. Soybean plants were domesticated between 17th and 11th century BC in the eastern half of China where they were cultivated into a food crop. From about the first century AC to the Age of Discovery (15-16th century), soybeans were introduced into several countries such as Japan, Indonesia, the Philippines, Vietnam, Thailand, Malaysia, Burma, Nepal and India. The spread of the soybean was due to the establishment of sea and land trade routes. The earliest Japanese reference to the soybean is in the classic Kojiki (Records of Ancient Matters) which was completed in 712 AC.
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