Jinbō Nagamoto (神保 長職, ? – 1572?) was a Japanese daimyo of the Sengoku period, who was the last lord of the Jinbō clan. He is most remembered for almost constant warfare with Shiina Yasutane, and their rivalry has been compared to that of Takeda Shingen and Uesugi Kenshin. Much like Shingen and Kenshin, they met once in personal armed combat in 1554 during the battle of Imizu. During the combat, Nagamoto struck Yasutane across the jaw with his sword, permanently disfiguring him. When the Shiina generals ordered Nagamoto chased down and captured, he was assisted in his escape from the battlefield by his page, Chiba Kazusa. A Chiba family legend states that Kazusa donned Nagamoto's distinctive helmet and rode into the ranks of the pursuing Shiina, calling out that he was Jinbo Nagamoto and daring the pursuers to try to take his head. Kazusa is said to have killed over twenty of the enemy before being shot from his horse by an arrow.[1]