Imagawa Sadayo

Imagawa Sadayo (今川 貞世^?, 1326 – 1420), also known as Imagawa Ryōshun (今川 了俊^?), was a renowned Japanese poet and military commander who served as tandai ("constable") of Kyūshū under the Ashikaga bakufu from 1371 to 1395. His father, Imagawa Norikuni, had been a supporter of the first Ashikaga shogun, Ashikaga Takauji, and for his services had been granted the position of constable of Suruga Province (modern-day Shizuoka prefecture). This promotion increased the prestige of the Imagawa family (a warrior family dating from the Muromachi period, which was related by blood to the Ashikaga shoguns) considerably, and they remained an important family through to the Edo period.

During his early years Sadayo was taught Buddhism, Confucianism and Chinese, archery, and the military arts such as strategy and horse-back riding by his father (governor of the Tōkaidō provinces Tōtōmi and Suruga), along with poetry, which was to become one of his greatest passions. In his twenties he studied under Tamemoto of the Kyogoku school of poetry, and Reizei Tamehide of the Reizei school. At some point, he was appointed to head the boards of retainers and coadjudicators. He had taken religious vows when the Ashikaga bakufu called upon him to travel to Kyūshū and assume the post of constable of the region in 1370 after the failure of the previous constable to quell the rebel uprisings in the region, largely consisting of partisans of the Souther Court supporting one of the rebellious Emperor Go-Daigo's sons, Prince Kanenaga. By 1374-1375, Sadayo had crushed the rebellion, securing for the Bakufu northern Kyūshū, and ensuring the eventual failure of the rebellion and the consequent success of the Bakufu Shogunate.

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