Nanbu Yoshihiro was a prominent Japanese samurai and military leader during the late 16th century. He was a member of the Nanbu clan, which played a significant role in the political landscape of the Tōhoku region. Known for his strategic skills, Yoshihiro served under the powerful warlord Date Masamune and participated in various battles during the tumultuous Sengoku period. Yoshihiro is particularly noted for his leadership in the Battle of Sekigahara in 1600, where he fought for the Eastern Army. His legacy includes contributions to the unification of Japan and the establishment of the Nanbu domain in modern-day Iwate Prefecture.