Akimitsu was a son of Date Harumune. He succeeded Ishikawa Harumitsu and retired in favor of his son Yoshimune in 1603. When Yoshimune died soon afterwards, Akimitsu resumed control of the Ishikawa clan and served Date Masamune in the Osaka Summer Campaign (1615). At the battle of Dômyôji, Akimitsu is reputed to have taken five heads.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005