Medieval Japan By lily smith Period: Apr 27, 700 to Apr 27, 1700 Medieval Japan Jan 1, 710 The imperial court is established at Nara Jan 1, 1192 Yoritomo becomes shogun Japan is ruled by a military style government; the Mongols invade Japan. Jan 1, 1333 Japan is briefly under imperial rule. Jan 1, 1336 First contact with Europeans. Jan 1, 1543 Portuguese traders arrive in Japan. Jan 1, 1576 The shogunless period begins. Jan 1, 1603 Japan closes its door to the West; Military rule Mar 2, 2022 The Heian period begins a time of cultural and artistic