Ii Naomasa
was a Japanese "daimyō" of the late Sengoku period through early Edo period, who served the Tokugawa clan. As one of the Tokugawa family's foremost military commanders, he was considered one of its "Four Guardian Kings" ("shitennō" 四天王) along with Sakai Tadatsugu, Honda Tadakatsu and Ii Naomasa. His court title was "Shikibu-Shō" (式部大輔).