A powerful local lord in medieval Hoki Province. According to legend, he was a member of the Sasaki Shioya clan, the guardian of Izumo, and his ancestor Sadamune built a castle in Ueishi, Kawamura County, in 1366 (Shohei 21, Joji 5) and made it his base. During the Sengoku period, he organized the local lords and local lords in the surrounding area into his own vassals, and grew into a powerful local lord who exerted his influence over the Kawamura County and eastern Hoki region. He was temporarily driven out of the castle by Amago Tsunehisa, but regained his former territory with the fall of the Amago clan. In 1579 (Tensho 7), due to a conflict with the Sugihara clan of Nishi-Hoki, who were famous alongside the Nanjo clan of Hagoromoishi, the clan had established ties with the Kansai region, and in 1582 they were attacked by the Mori clan and surrendered to their forces. However, in 1585 a peace agreement was made between the Mori clan and Toyotomi Hideyoshi, and the Nanjo clan regained their position as lords of Hagoromoishi Castle and the three counties of Kawamura, Kume, and Yatsuhashi. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
中世伯耆国の有力国人。所伝によれば,出雲守護佐々木塩冶氏の一族で,その祖貞宗が1366年(正平21∥貞治5)河村郡羽衣石(うえいし)に城を築いてここに拠ったという。戦国期には周辺の国人・土豪層を自己の家臣団に編成し,河村郡・東伯耆一帯に勢力を張る有力国人へと成長した。尼子経久のため一時城を追われたが,尼子氏の没落とともに旧領を回復。1579年(天正7)羽衣石南条氏と並び称せられた西伯耆杉原氏との対立から上方に誼(よしみ)を通じたため,82年毛利氏に攻められその軍門に下ったが,85年毛利・豊臣秀吉の和睦が成り,南条氏は河村・久米・八橋3郡の領主として再び羽衣石城主の地位を得た。
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