Tokugawa launched edicts that expelled all Christians from Japan and isolated Japan from most foreign trade, excluding the Dutch, Korean, and Chinese.
In the Battle of Sekigahara, Tokugawa led his army against Ishida Mitsunari and eventually became appointed Shogun by the Japanese Emperor – a title desired, but never obtained, by both Nobunaga and Hideyoshi – but ended up surprising everyone when he renounced the title only two years later. Tokugawa’s last known activity was during the Siege of Osaka, where Sanada Yukimura managed to charge through his camp to confront him. Although the death of Yukimura marked the end of Tokugawa’s opposition, he still feared any threats coming from outside. As such, Tokugawa launched edicts that expelled all Christians from Japan, and isolated Japan from any foreign trade, excluding the Dutch, Korean, and Chinese. While his fears may have been well-established, given the betrayal against Oda Nobunaga and the ‘mysterious’ death by Hideyoshi Toyotomi, his policies had long-tern effects that limited Japan’s overall progress against foreign powers.
In modern days, Tokugawa is often portrayed as an old, relatively boring man best regarded for his patience and wisdom in knowing when to act. In One Piece, Tokugawa is compared to Admiral Kizaru of the Marines for his cleverness and, in the Fate/Nasu-verse, he is characterized as a hero worthy of the Saber class.