- "If you are not wounded, you have not truly fought."
- ―Ii Naomasa.[src]
Ii Naomasa (4 March 1561 – 24 March 1602) was a general under the daimyo and shogun Tokugawa Ieyasu, regarded as one of the "Four Guardians" of the Tokugawa, along with Honda Tadakatsu, Sakakibara Yasumasa and Sakai Tadatsugu. He was a veteran of numerous battles, and was famous for continuing to fight even after sustaining severe injuries.
While the rest of the Four Guardians were not easily convinced that the Assassins could aid them, Naomasa saw differently. He recognized that the Assassins could prove to be valuable allies, and often suggested calling on them to his colleagues.
During the Battle of Sekigahara on 21 October 1600, Naomasa was critically wounded by a stray bullet fired by Shima Sakon's unit. Though Yamauchi Taka exacted revenge on Sakon on Naomasa's behalf, Naomasa eventually succumbed to his wounds.