Henceforth Yoritomo's brilliant victories were largely owing to the generalship of his brother. But no sooner had the latter destroyed the remnants of the Minamoto's enemy than his own safety was endangered by his very success, for Yoritomo grew jealous of his great renown and popularity. As Yoshitsune escorted the captive chief of the Taira clan, Munemori, to Kamakura, he not only received no recognition for his achievements, but also was refused admission to the presence of his brother. There were not lacking men around the latter to contrive the downfall of the great general. Shortly afterward Yoritomo sent to Kyōto a man of proved valor and strength, Tosabō Shōshun, with orders to destroy Yoshitsune, but Tosabō himself fell under Yoshitsune's sword in the attempt. Thereafter Yukiiye, Yoshitsune's uncle, induced the ex-emperor to authorize them to put down Yoritomo. But Yoritomo addressed himself to the ex-emperor with such persuasion that an imperial mandate was issued to all the provincial authorities ordering them to arrest Yoshitsune and Yukiiye. Yoritomo thereupon dispatched Hōjō Tokimasa to Kyōto to quell the partisans and restore order in the capital. Yukiiye was subsequently killed in the province of Izumi, but Yoshitsune escaped to his friend Fujiwara-no-Hidehira in Mutsu. The latter, however, died soon afterward, and was succeeded by his son Yasuhira, who received from Yoritomo orders to kill the fugitive. So great and far-reaching was the authority of the Minamoto chief at that time that Yasuhira had no choice but to comply with the mandate. He caused Yoshitsune to be put to death, and sent his head to Kamakura. Tradition has, however, been reluctant to admit so ignominious an end to the hero, who, it says, effected his escape to the island of Ezo (Hokkaido) and thence to the continent, where he became a great prince over nomadic tribes. Nor did Yasuhira's treachery bring fortune upon himself, for Yoritomo, already desirous to bring Mutsu under his direct rule, pretended to believe that Yasuhira had been unduly slow in destroying his rebellious brother, and, in 1189, led in person a large army, which succeeded in a brief time in killing Yasuhira and subduing the great provinces of Mutsu and Dewa. In the next year, Yoritomo repaired to Kyōto and had his first audience of the emperor and the ex-emperor.[1] The latter treated him with great consideration, and after the lapse of a year conferred upon him the title of _sei-i-tai-shōgun_, or generalissimo, which has since been the customary title of the feudal overlord of Japan.