In Mongolia, on the northeast of China, there appeared a conqueror of world-wide fame, Temujin, the great Genghis Khan. Against his armies the Tatar kings were unable to hold their ground, and ultimately the wave of Mongol conquest flowed into the dominions of the Sung sovereign in the south of China. Temujin's grandson, Kublai, possessed himself of a great part of Korea, and having concerted measures for overthrowing the Sung dynasty and bringing all China under Mongol rule, he conceived the project of subjugating Japan also. His first step toward consummating that design was to send envoys via Korea, who were instructed to remonstrate with the Japanese sovereign for his indifferent attitude toward the Mongol autocrat. But the Koreans dissuaded these envoys from prosecuting their voyage. Two years later, in 1268, Kublai dispatched another embassy to Dazaifu in Kiushū, with letters to the governor of Dazaifu as well as to the Emperor of Japan, the ostensible object of the communications being to establish amicable relations between the two countries. From Dazaifu intelligence of the coming of the embassy and the nature of its documents was forwarded to Kamakura, thence to be sent in turn to the court in Kyōto. Considerable anxiety was caused by the news, both in official and in civilian circles. The emperor laid before the shrine of Daijingū an autographic supplication for the heavenly protection of the empire, and caused prayers of a similar purport to be said at all the shrines and temples throughout the realm. Careful measures were also taken to guard the coasts, more particularly the points of strategical importance in Hizen and Chikuzen.