Nagamasa is a masculine Japanese given name. Notable people with the name include:Asano Nagamasa , Japanese daimyō Azai Nagamasa , Japanese daimyō Ikeda Nagamasa , Japanese samurai Kizawa Nagamasa , Japanese daimyō Kuroda Nagamasa , Japanese daimyō Oda Nagamasa , Japanese daimyō Yamada Nagamasa , Japanese explorer
