Shibukawa Yoshinaga served as a bushō during the Sengoku period. He was the Kyūshū tandai, or Commissioner of Kyūshū.
Yoshinaga was born as the lineal heir of Shibukawa Tadashige, the Kyūshū tandai.
Similar to his father, he received one of the characters in his name from Ashikaga Yoshitane, the tenth shōgun of the Muromachi bakufu. His initial name was Tanenao, and later he received the character “yoshi” from the Ashikaga shōgun family and adopted the name of Yoshinaga.
In 1504, Tadashige transferred to Yoshinaga the roles of military governor of Hizen Province and the Kyūshū tandai.
In 1533, Yoshinaga was betrayed by his protector, Ōuchi Yoshitaka. After colluding with Shōni Sukemoto, an archenemy of the Ōuchi, Yoshinaga was attacked by the Ōuchi army.
In 1534, after the Ōuchi army toppled Asahiyama Castle, Yoshinaga took his own life. The demise of Yoshinaga marked the end of the Shibukawa clan in Hizen in addition to their hereditary role as the Kyūshū tandai.