Kublai Khan, the Grandson of Genghis Khan, became emperor of Mongolia in 1260. Northern China was already under his control and Korea gave him access to the sea, with Japan just 100 miles away. Five times, between 1266 and 1274, Kublai Khan sent emissaries to the Emperor of Japan, addressing him as "the ruler of a small country", demanding he pay tribute and become a vassal state. Five times the emissaries returned empty-handed. Dur: 18mins File: .mp3