Japan's foreign relations naturally began with the neighboring peninsula of Korea, which then contained several petty kingdoms at variance with one another. Political relations of Japan with some of these small states must have begun very early, but the traditional accounts concerning them are meager and untrustworthy. It is probable that some of the Korean chiefs were at different times tributary to Japan. The relations with Korea, however, appear to have become serious only when it was suspected that the restless tribes of Kiushū had been encouraged by Shiragi, the most warlike kingdom in the peninsula, in their repeated acts of rebellion against the emperor of Japan. In this light may be read the following famous legend of the Japanese expedition to Korea, which is said to have taken place about 200 A. D., under the leadership of the valiant Empress Jingō and her minister, Takenouchi. Tradition says that, as the Kumaso of Tsukushi, Kiushū, again rose in arms, the Emperor Chūai proceeded thither in person, and, through his minister, prayed for the guidance of the gods. Thereupon the latter inspired the empress, who had joined the imperial expedition, to declare that if Shiragi was first conquered, the Kumaso would submit without further resistance. The emperor, however, hesitated to take this divine counsel, and the deities punished his disobedience by death. Awed by this startling event, the empress gave directions that her consort's death should be kept secret, and having intrusted to his generals the duty of guarding the temporary palace at Tsukushi, she sent Takenouchi to convey the emperor's remains to Nagato by sea, while she herself remained to mourn the death of her husband in his prime. Sacrifices were again offered to heaven, and prayers again addressed to the deities, to which the reply was the same as before. After subduing several rebel tribes, the empress came to a river, where she sought by fishing to obtain an omen as to whether the conquest of Korea should be attempted. The indications being in the affirmative, she finally resolved to lead an expedition in person across the sea. Sacrificial rites were again performed to all the deities, and the empress, returning to Kashihi Bay, ordered the people to build ships, and sent sailors westward to reconnoiter the land which she contemplated invading. By and by, a lucky day having been chosen, the Japanese fleet set out from Wanizu in Tsushima, and, aided by a favorable wind, soon reached the coast of Shiragi. Hasankin, the king of Shiragi, was so much alarmed by the appearance of the invading force that, without offering any resistance, he came to sue for peace, and made a solemn pledge that he would henceforth serve the ruler of Japan as a groom and send her annual tributes. Shiragi, he declared, would abide by his oath, "till the river Yalu flowed backward and sands rose to sky and became stars." The kingdoms of Koma and Kudara followed the example of Shiragi, so that the