( â 1497) was a Muromachi period warrior and the Kamakura-fu's fifth and last Kantà  kubà  (Shà Âgun Deputy). Fourth son of fourth Kubà  Ashikaga Mochiuji, he succeeded his father only in 1449, a full decade after his death by seppuku. His childhood name was . His rule was from its onset troubled by hostilities with the central government: he was finally deposed in 1455 by shà Âgun Ashikaga Yoshimasa, after which he escaped to Koga in Shimà Âsa Province, where he became known as Koga kubà Â. There, he ruled until his death in 1497.
When in 1439 shà Âgun Ashikaga Yoshinori attacked and invaded Kamakura, its ruler Mochiuji committed seppuku near today's Zuisen-ji to escape capture. His eldest son Yoshihisa, 14 years old at the time, was also forced to kill himself at nearby Hà Âkoku-ji. His three younger sons however escaped to Nikkà  and in 1440 were led by Yà «ki Ujitomo, head of the Yà «ki clan, to his castle in Koga, Shimà Âsa Province, and survived. When later Ujitomo's castle was attacked by the shogunate, they escaped. Two, Haruà Â-maru and Yasuà Â-maru, however were caught and executed, while Eijuà Â-maru survived. Kamakura and the Kantà  would then be ruled for the shogunate by the Uesugi clan until 1449. In that year, Eijuà Â-maru's uncle à Âi Mochimitsu managed to have him appointed to the post of Kantà  kubà  (shà Âguns deputy in the Kantà  region), the first Ashikaga to hold the post since his father's death ten years earlier. On the occasion, the 11-year-old boy reached manhood and received the character for the adult name he was about to assume from shà Âgun Yoshimasa himself (who took it from his former name, ) and became Shigeuji. Shà Âgun Yoshimasa, not trusting Shigeuji, nominated his ally Uesugi Noritada kanrei with the task of keeping him informed of what happened in Kamakura. The relationship between the two men, already difficult because of the role the Uesugi had had in Mochiuji's death, was therefore strained from the beginning. Tension culminated with Shigeuji's 1454 killing of Noritada, who was invited at Shigeuji's mansion and there murdered. The killing made the Kantà  province fall into chaos because all Uesugi vassals rose against Shigeuji. Imagawa Noritada defeated Shigeuji and Kamakura, and in 1455 Shigeuji had to flee to the friendly city of Koga, where in time he became known as the Koga kubà Â. The Uesugi asked Yoshimasa to send someone to replace Shigeuji, so he sent his younger brother Masatomo with an army to pacify Kantà Â, but many vassals had remained faithful to Shigeuji, so Masatomo was unable to even enter Kamakura. He had to stop in Horigoe in Izu Province, and was thereafter known as Horigoe Gosho. The Kantà  therefore found itself with two rulers, one in Koga and one in Horigoe, neither of whom was able to rule. The Kantà  was, for all practical purposes, once again in the hands of the Uesugi.
This was the beginning of an era in which the Kantà  and Kamakura were devastated by a time of civil wars called the Sengoku period. War continued with on one side Masatomo and the Uesugi, on the other Shigeuji and the Chiba, the Utsunomiya, the Oyama and other clans. In 1471 Uesugi forces arrived in Koga, so Shigeuji had to escape to Chiba. Hostilities ceased only in 1482. Shigeuji was able to return to Koga, where he founded a dynasty and ruled until his death in 1497.