Tokugawa Iemitsu (1604-1651) governed Japan as the third shogun of the Edo period. He implemented a number of important policies that not only consolidated his family's hold on power but also greatly impacted Japanese society for several centuries. These included formalizing the sankin kotai system that required daimyo to spend alternate years in Edo and their own territory and the exclusion edicts that restricted contact between Japan and foreign countries.
This is a companion discussion topic for the original content at https://www.worldhistory.org/Tokugawa_Iemitsu/.