Lifespan: Chōkyō 3 (1489) to 9/4 of Tenbun 5 (1536)
Title: Ōmikotomochi-daini (Governor-General of Kyūshū)
Father: Shōni Masasuke
Siblings: Yoritaka, Takatsune, Sukemoto, Egami Suketane, Minami-dono (wife of Matsura Masashi)
Wife: [Formal] Daughter of Ōtomo Chikaharu
Children: Fuyuhisa, Chiba Taneyori, Masaoki, Motomori, Matsura Shizume
Shōni Sukemoto served as a daimyō during the Sengoku period. He was the sixteenth head of the Shōni clan.
In 1489, Sukemoto was born as the son of Shōni Masasuke, the sengoku daimyō of Hizen Province.
In 1497, Sukemoto’s father, Masasuke, and his older brother, Shōni Takatsune, were the subject of an order from the Muromachi bakufu to be tracked down and killed, whereupon members of the Ōuchi clan from Suō Province attacked and eliminated them.
At the time, Sukemoto was a child so he was protected by former retainers including Yokodake Sukesada at Nishijima Castle in the Mine District of Hizen. At his coming-of-age ceremony, Sukemoto received the backing of Ōtomo Masachika of Bungo Province to revive the Shōni clan.
In 1530, upon orders of Ōuchi Yoshitaka, Sukemoto was attacked by Sugi Okikazu, the deputy military governor of Chikuzen Province. In 1530, at the Battle of Tadenawate, Sukemoto, with the support of retainers such as Ryūzōji Iekane, succeeded in repelling the Ōuchi forces. Thereafter, the Ryūzōji clan gained prominence while the influence of the Shōni began to wane. After becoming weary from incessant attacks by the Ōuchi, Sukemoto followed the advice of Iekane to settle with them, but this settlement was a ploy and, in 1535, the Ōuchi captured all of Sukemoto’s territory.
In 1536, following his appointment by the Muromachi bakufu to serve as the Ōmikotomochi-daini (the governor-general with jurisdiction over Kyūshū), Ōuchi Yoshitaka had a senior retainer, Sue Okifusa, attack Sukemoto which resulted in Sukemoto taking his own life. This occurred at Kajimine Castle which was the same location where his father, Masasuke, ended his own life.
His son, Fuyuhisa, fled for safety to Hasuike Castle defended by Oda Sukemitsu (the grandfather of Masamitsu), preserving the bloodline of the Shōni clan.
Sukemoto’s fourth son, Shōni Motomori, received one of the characters from the name of Sukemoto and adopted the name of Motomori at the time of his coming-of-age ceremony.