Hayashi Razan
Theoretical obligations between a samurai and his lord (usually a "daimyō") increased from the Genpei era to the Edo era. They were strongly emphasized by the teachings of Confucius and Mencius, which were required reading for the educated samurai class. The leading figures who introduced Confucianism in Japan in the early Tokugawa period were Fujiwara Seika (1561–1619), Hayashi Razan (1583–1657), and Matsunaga Sekigo (1592–1657).