Throughout East Asian history, Japan has been largely influenced by mainland Asia. From ancient times to the medieval period, significant contributions to Japan can be seen coming from both Korea and China. Both of these countries spread elements of their cultures to form the basis of Japanese society, namely China. These foreigners would influence various aspects of society including technology, philosophy, politics, and religion. The first example of foreign influence in Japan is documented as the Yayoi Revolution. Due to uncertainty during the Warring States period, a large-scale migration of peoples from the Asian continent – ​​mainly Koreans and Chinese – passed through Japanese territory. The migrants brought with them important technological advances that had been put into practice on the mainland, including; wet rice cultivation, as well as iron and bronze technology, making Japan the only civilization to experience the bronze and iron revolutions simultaneously. Wet rice cultivation was a technique that used a strain of rice from the southern regions of China and produced large quantities of food. Bronze was used to make various ceremonial objects, while iron was mainly used for weapons and agricultural tools. The introduction of these technologies advanced the migrants over the native Ainu peoples and aided them in their new control of the island. During the Yamato state period, the Japanese had extensive relations with the Koreans that would improve them both politically and culturally. During this period, Korea was ruled by three ruling kingdoms; Koguryo, Paekche and Silla. These three kingdoms were at constant war with each other; due to Silla's aggressiveness, Paekche turned to Japan for help....... middle of paper ...... and to Buddhism. Similarly, another monk named Kukai went to China to study a new sect called Shingnon. Shingnon was based on mystical and esoteric rituals and became popular in the Japanese court. Buddhism became so popular in Japan that traditional Shinto deities began to take second place in society. Since both religions addressed different aspects of life, a syncretism occurred. Emperors practiced Buddhism and at the same time took part in Shinto rituals to promote harvests. Eventually, in the mid-8th century, Buddhist priests began to take part in Shinto rituals. This participation of Buddhists in the Shinto ceremony led Shinto deities and Buddhist bodhisattvas to relate to each other; deities began to be seen as manifested by bodhisattvas. What Japan saw was its traditional religion being combined with foreign beliefs.