The 109th Division was an infantry division of the Imperial Japanese Army. Its call sign was the Courage Division . It was formed on 24 August 1937 in Kanazawa as a square division, simultaneously with the 108th division. The nucleus for the formation was the 9th division headquarters. It was subordinated from the beginning to the Japanese Northern China Area Army.

Colonel Baron Takeichi Nishi was an Imperial Japanese Army officer, equestrian show jumper, and Olympic Gold Medalist at the 1932 Los Angeles Olympics. He was a tank unit commander at the Battle of Iwo Jima and was killed in action during the defense of the island.