shogun japan By Stephanie Cameron Period: 793 to 1185 Heian period Period: 1180 to 1185 Genpei War Period: 1183 to 1333 Kamakura period Period: 1334 to 1573 Muromachi Period: 1573 to 1582 Oda Nobunaga unifies much of Japan Period: 1574 to 1600 Azuchi-Momoyama Period: 1598 to 1868 Tokugawa (Edo) Period: 1600 to 1603 Tokugawa Ieyasu becomes shogun (start of Edo period)