Among the members of the Minamoto family at the time of which we write was one Yorimasa, who, incensed by the arbitrary proceedings of the Taira officials, persuaded Prince Mochihito, son of the ex-Emperor Goshirakawa and brother-in-law of the Emperor Takakura, to form an alliance with the priests of Onjō-ji and Kōfuku-ji, their object being to expel Kiyomori from court and to rescue the ex-emperor from his confinement in the Toba palace. In 1180, the prince dispatched Yukiiye, younger brother of the late Yoshitomo, to the remnants of the Minamoto in the eastern provinces, carrying an edict which summoned them to rise and overthrow the Taira family. Fortunately for the latter, the plot was discovered and at once suppressed. But the seed sown by this abortive rebellion proved beyond Kiyomori's control, for, in the same year, 1180, the exile, Minamoto-no-Yoritomo, who was destined to become the founder of the feudal government of Japan, raised a force of troops in the small island of Izu in obedience to the mandate of Prince Mochihito. Many partisans flocked to his standard from Kwantō, the former seat of Minamoto influence. Almost simultaneously, another Minamoto chief, Yoshinaka, also took the field in the prince's cause, his headquarters being at Kiso, in Shinano, where he collected a large body of soldiers. Kiyomori lost no time in dispatching a powerful army against the rebels, but his forces suffered defeat and were driven back. Henceforth, many puissant warriors of the Hokuriku region threw in their lot with the Minamoto, and the force at the latter's disposal assumed formidable dimensions. Even the great temples in the vicinity of the capital opened communications with the insurgents, which so exasperated Kiyomori that he reduced the temples to ashes and confiscated all their lands. These extreme measures served to check temporarily the active exercise of priestly power, but did not affect the prestige of the Minamoto, whose strength continued to grow rapidly. Kiyomori finally saw himself compelled to relax the ex-emperor's confinement, and even to allow him to resume an active part in the administration of state affairs. But in the year 1182 the great Taira chief was stricken by a fatal malady, and expired after a brief illness. He was succeeded by his son Munemori, who did not spare to direct all the strength of the clan against the Minamoto. But fortune shone on the latter's arms in several encounters, until, in 1183, Minamoto-no-Yoshinaka inflicted a signal defeat on the Taira forces in a pitched battle, and dividing his own army into two bodies, pushed, via the Tosan and Hokuriku routes, as far as the temple Enryaku-ji in the immediate vicinity of Kyōto, where he was secretly visited at night by the ex-Emperor Goshirakawa. The Emperor Antoku now fled westward, carrying with him the three insignia, and escorted by Munemori and the Taira forces. The imperial train reached Dazaifu, in Kiushū, where the Taira wielded great influence.