Honda Tadakatsu (本多 忠勝?, March 17, 1548 – December 3, 1610), also called Honda Heihachirō (本多 平八郎), was a Japanese general (and later a daimyo) of the late Sengoku through early Edo period, who served Tokugawa Ieyasu. Honda Tadakatsu was one of the Tokugawa Four Heavenly Kings along with Ii Naomasa, Sakakibara Yasumasa and Sakai Tadatsugu.