China/Japan history By bray 300 Yayoi organize in Japan 400 Yamto controls Japan 590 Grand canal connects northern and southern China 604 Prince Shotoku writes Japanese constitution 631 Takai reforms Japan 690 Empress Wu starts ruling 898 Earliest known book was printed 1150 Chinese perfect magnetic compass. 1211 Genghis Khan invades northern China 1260 Kublai Khan rules Mongol Empire. 1421 Emperor Yong Le builds the Imperial city 1644 Manchus conquer Ming dynasty