Akagi was no ordinary carrier. Laid down as a battlecruiser and converted in the 1920s, she was the flagship of the Kido Butai, the strike force that hit Pearl Harbor, and Admiral Nagumo's own ship. By June 4, 1942, she had never lost a battle.
That morning she was at her most vulnerable. Nagumo had spent hours flip-flopping on whether to arm his reserve aircraft with land bombs for a second Midway strike or torpedoes for the American fleet. The result: her hangars were crammed with fueled aircraft, open fuel lines, and ordnance stacked loose on the deck because crews had no time to strike the swapped bombs down to the magazines. Her fighter cover was at wave height, slaughtering the American torpedo squadrons.
At about 10:25, three Dauntlesses peeled off toward her. Just three, led by Lt. Richard Best of Bombing Six, who had broken off from the mass attack on Kaga after realizing nearly the whole squadron was diving on the same ship. Best's two wingmen, Kroeger and Weber, near-missed. One bomb exploded close astern, wrecking her rudder so she could only steam in helpless circles.
Best's bomb did the rest. A single 1,000-pounder punched through the flight deck at the edge of the midships elevator and burst in the upper hangar, in the middle of armed and fueled torpedo planes. The hangar became a furnace. Stored torpedoes and the bombs left lying on deck began cooking off in chain-reaction explosions her damage control teams could never get ahead of. One bomb, almost certainly the most destructive single bomb hit of the Pacific War, had killed a fleet flagship.
The fires drove everyone off the bridge. Nagumo, stunned, initially refused to leave. His chief of staff had to argue him into it, and the admiral of the world's most feared carrier force finally climbed down a rope from a bridge window at 10:46 and transferred to the cruiser Nagara, his fleet collapsing behind him.
The crew fought the fires all day. By 13:50 she was dead in the water and most of the crew was evacuated, leaving Captain Taijiro Aoki and his damage control parties aboard. Aoki, by tradition, intended to die with his ship; accounts hold that he had himself lashed near the anchor windlass to wait for the end. His officers and a direct order eventually got him off, under protest. He survived the war.
Even then Tokyo couldn't let her go. Yamamoto, who had once captained Akagi himself, hesitated for hours before authorizing the unthinkable: the first scuttling of a Japanese warship by Japanese torpedoes. At 04:50 on June 5 he gave the order. Four destroyers, Arashi, Hagikaze, Maikaze, and Nowaki, each fired a torpedo, and at 05:20 Akagi went down bow first, taking 267 of her crew. Arashi, fittingly, was the same destroyer whose wake had led Best's group to the fleet in the first place.
She rested undisturbed for 77 years until October 2019, when the research vessel Petrel found her 5,490 meters down, sitting upright on the Pacific floor.