Since the ancient time, Japan and China are neighbour countries because geography reasons. Confucianism is an ethical and philosophical system advanced by Chinese philosopher Confucius during the Spring and Autumn Period. The five virtues in Confucian thought are Ren, Yi, Li, Zhi, Xin which called Wuchang and accompanied by four virtues Zhong, Xiao, Jie, Yi called Sizi. Since the Han period, most of Chinese emperors used legalism and Confucianism as dominating dogma to rule people. The main reason is the loyalty and social relationship theory of Confucianism provided great help for emperor to rule people. The loyalty thought people should support as the centre of monarch and be unconditional loyalty all of their life. Confucius claimed that “a prince should employ his minister according to the rules of propriety; ministers should serve their prince with faithfulness (loyalty)”. And in the relationship theory, Confucius thought that people should respect to seniority and both monarch and populace were decided to be since they were born. In other words, Confucianism established a strict social rank order to manage people. This thought lasted for hundreds years even after Confucianism is introduced to Japan and made great influence to political history of Japan. According to early Japanese writing, Confucianism was introduced to Japan in the year of 285 AD. The Confucianism in Japan is not exactly the same as it in China. Neo-Confucianism as a Japanese Confucianism was fused by Japanese traditional thoughts. Neo- Confucianism influenced Japan since Kamakura period and developed during Edo-period. It was known as Shushi-Gaku in Japan. Like Chinese Confucianism, Neo- Confucianism is an ethic and social philosophy based on metaphysical idea. The main theory can be summarized as humanistic and rationalistic that proposed a concordant relationship between the universe and the individual. Neo-Confucianism was the most important philosophy of Tokugawa Japan in government and education. It influenced Japanese society intensively which is still obvious until today. During edo-period, the social aspect of the philosophy divided Japan in four main classes: the samurai which at the top of the social hierarchy, the farmers, artisans and merchants. It is clear that Confucianism is the theoretical basis of samurai’s position. Kamakura period is the time samurai began rise. At first, samurai was organized by Minamoto no Yoritomo, the founder and first shogun of the Kamakura shogunate of Japan at the end of Heian period. At Kamakura period, samurai began to rise and played more important part in ruling class. Confucianism played a major role in the social, bureaucratic and ethical structures in Japanese culture. After Muromachi period, Sengoku period, Azuchi- Momoyama period and hundreds years of war, in Edo- period, Tokugawa Ieyasu, the founder and first shogun of the Tokugawa shogunate decided to use Neo-Confucianism as official guiding philosophy. From that time, Neo-Confucianism formally began to make a great influence in Japan. The four main components of Neo-Confucianism which influenced in Japan are social