2nd Takao-class heavy cruisers (sister ships were Takao 高雄, Maya 摩耶 & Chōkai 鳥海)
Commissioned: 30 March 1932
Guadalcanal campaign - Battle of the Eastern Solomons (24–25 Aug 1942) - Battle of Santa Cruz Islands (26–27 Oct 1942) - Second Naval Battle of Guadalcanal (15 Nov 1942)
3rd modernization & refit at Yokosuka Naval Arsenal (Jul~Aug 1943): added two triple-mount Type 96 25 mm anti-aircraft guns.
Battle of the Philippine Sea [19~20 Jun 1944]
Battle of Leyte Gulf [23~26 Oct 1944] - Atago was torpedoed and sunk by submarine USS Darter on 23 October 1944.