Two of the four Japanese aircraft carriers lost at Midway remained on the Imperial Navy’s ship registry for 112 days after they sank. Akagi and Hiryu went down on June 5, 1942, but both were not struck from the list until September 25 of that year. The other two carriers lost in the battle, Kaga and Soryu, were removed from the same registry on August 10, six and a half weeks earlier. All four ships burned and sank within a day and a half of one another, yet the paperwork treated them as two different kinds of events.
The gap between those two dates reflects what Tokyo decided to tell the public. On June 10, six days after the battle ended, Imperial General Headquarters announced that Japanese naval forces had struck Midway on the 5th, sunk two American carriers, and shot down 120 enemy aircraft. The announcement also reported landings at several points in the Aleutian Islands, described as the first breach of the American continental defense line. The following morning, the Japan Times and Advertiser published the news under a headline proclaiming another historic naval victory.
Almost nothing in that announcement was accurate except the part about the Aleutians. The Americans had lost one carrier, Yorktown, and one destroyer. Japan lost Akagi, Kaga, Soryu, and Hiryu, plus the heavy cruiser Mikuma, 248 carrier aircraft, and 3,057 men. Those four carriers represented two-thirds of the country’s carrier strength and the core of the force that had opened the war at Pearl Harbor six months earlier.
The Imperial Navy knew all of this within hours. Its own files recorded every detail in depth while the newspapers ran a different account. There is a document that proves it, and its contents reveal what a concealed defeat looks like from the inside. The process of hiding the loss began at the anchorage, not on paper.
The fleet returned to Hashirajima near Hiroshima on June 14. The wounded were taken off the ships first. Naval hospitals classified most of them as secret patients and placed them in isolation wards, keeping them away from other men in those wards and from their families. Wives and fathers who came to the gates were sent home.
Men who returned uninjured were moved to other fleet units under the same restrictions, barred from visiting family or friends, and then sent south. Most of them joined combat units in the South Pacific, which meant the Solomon Islands by August 1942. Most of them died there. The navy did not simply falsify battle reports and stop.
It physically relocated thousands of men to places where they could not talk. A large share of those men were the trained personnel who had just witnessed firsthand everything the service most needed to understand about carrier warfare. Outside the navy, almost no one was told. The emperor and the senior naval command had the real numbers.
The Imperial Army did not, and for a period after the battle, the army continued planning on the assumption that Japanese carrier strength remained intact. One army unit shows the value of that assumption. Colonel Kiyonao Ichiki’s 28th Infantry Regiment had been assigned to invade and occupy Midway. In early June, the regiment was aboard transports near Guam awaiting a landing that never came.
Ten weeks later, the same regiment was in the Solomons. Six destroyers landed 907 of Ichiki’s men at Taivu Point on Guadalcanal on August 19. On the 21st they attacked Marine lines at Alligator Creek. Between 704 and 800 of them were killed there in a single night and morning.
The lie reached beyond the army. In the summer of 1941, the Axis powers had agreed in Rome on a shared path to victory based on a simultaneous push toward the Middle East and the Indian Ocean. The Japanese fleet was to cut British and American communication lines in the west while a German and Italian offensive drove toward Egypt. After Midway, the Japanese fleet could no longer do that, but it did not announce the fact.
Berlin and Rome kept planning around a fleet that no longer existed. When the Axis lost at El Alamein that autumn, Italy blamed the Japanese for never closing the back door. The two registry dates mark a deliberate difference in how the losses were treated. If the goal had been silence, all four ships would have been struck from the list together on a single day without explanation.
Instead, Kaga and Soryu were removed on August 10 because they were the two losses the navy ultimately acknowledged, added later and almost as an afterthought to the original announcement. Akagi and Hiryu were never acknowledged at all, so they stayed on the list as crews without ships for 46 more days. Neither date corresponds to the day either ship actually sank. While all of this was happening, the same service was also doing productive work.
On June 15, one day after the fleet anchored, Vice Admiral Chuichi Nagumo’s staff moved from the light cruiser Nagara to the battleship Kirishima. The First Air Fleet, which had run the carriers since early 1941, was dissolved and what remained was renamed the Third Fleet. Nagumo’s men were ordered to develop a new carrier doctrine. What they produced in late July 1942 was a serious and important analysis.
For the first time, the Imperial Navy stated in writing that the aircraft carrier had become, in the language of the new doctrine, the central and primary objective of the decisive air battle, and that surface forces would cooperate with the carriers rather than the other way around. That sentence removed the battleship from the top of Japanese naval thinking. It was written by the staff of a defeated force six weeks after a lost battle. Yamamoto’s plan for Midway had been built around a final gunnery action by his battleship formations, which never came within 200 miles of the fight.
The rest of the doctrine followed the same logic. Carrier divisions, previously two ships each, were rebuilt around three platforms: two fleet carriers and one light carrier. The smaller ship was intended above all to provide combat air patrol. Divisions were to sail widely separated from one another because concentrating all platforms in a single formation had been correctly identified as one of the causes of their destruction.
The Second Carrier Division proves the point. It went to Midway with Soryu and Hiryu. On July 14, it was back on the list with the same number and a new commander, consisting of Junyo and Ryujo. The division was just a line in the order of battle.
The ships that followed it were replaceable in a way the men were not. Ahead of the carriers, at a distance of 100 to 200 miles, a scouting line of cruisers and battleships was to advance, spread to the full extent of visibility, carrying seaplanes to search and pass raid warnings back to the ships behind. The commanders of those scouting ships quickly understood what their other job was. Their unwritten mission was to absorb the bombs aimed at the carriers, and this was not a popular doctrine among them.
It was also a substitute for something the Japanese had never built. By 1942, the American navy was combining radar data, radio intercepts, and visual sightings in a single room, the combat information center, and using that picture to direct fighters against incoming raids. Japan had radar on a few battleships and understood its value for gunnery and early warning, but the step of creating a room to manage the air battle was never taken on any Japanese ship at any point in the war. A line of cruisers stretched across 200 miles of ocean was the best answer the Imperial Navy produced to that problem.
Damage control training was expanded. The four ships lost at Midway had died from fires fed by aviation fuel and ammunition scattered in enclosed hangars. Arming and fueling operations were therefore moved to open spaces where aircraft and bombs could be pushed overboard quickly. Air groups were reorganized around fighters.
Before Midway, a carrier carried 54 aircraft in three equal squadrons of fighters, dive bombers, and attack planes. Shokaku and Zuikaku were now to carry 27 fighters, 27 dive bombers, and 18 torpedo planes. The light carrier Zuiho was to carry 21 fighters and six torpedo planes, and little else. Pilot training was accelerated, the candidate pool was expanded, and the rejection rate was reduced.
Each of those decisions was defensible on the evidence, and most were correct. They were made by an institution that, in the same weeks, was arranging to send the men who produced that evidence to a place where they would die. Those men were the last pre-war cadre. Once the Solomons destroyed them over the following year, the level of Japanese naval aviation began a decline from which it never recovered.
The training pipeline filled vacancies, but it could not fill them with men of the same quality. The cover-up had its own administrative work. News reached Emperor Hirohito on June 5, brought to his residence by a panicked member of the Navy General Staff. All he said to his aide-de-camp, Kido Koichi, was that the navy must not lose its fighting spirit.
His instruction to Admiral Nagano was that future operations should remain bold and aggressive. He then entrusted the task of burying the evidence to General Ando Kisaburo. Hirohito was so pleased with the result that he raised the idea of issuing an imperial rescript celebrating the victory at Midway, but his advisers persuaded him not to. The only serious leak that summer came from the other side of the Pacific.
On June 7, the day the battle ended, the American victory was on the front page of the Chicago Sunday Tribune. Next to it ran a second story headlined “Navy Had Word of Jap Plan to Strike at Sea. ” The article ran fourteen paragraphs and detailed most of what American intelligence knew about the Japanese fleet and its intentions before a single shot was fired. It stopped short of explicitly revealing that the Japanese naval code had been broken.
The story led to a federal investigation and a grand jury. The Imperial Navy, whose codes the story exposed, appears never to have noticed. One place where the names of those men are still preserved is not a Japanese file. On June 9, the American submarine Trout, on patrol west of Midway, picked up two men from the water amid oil and floating debris.
Both had served on Mikuma. Katsuichi Yoshida was the senior radio operator, and Kenichi Ishikawa was a third-class fireman. Yoshida had broken ribs and was taken to the naval hospital at Pearl Harbor on arrival. Ten days later, the seaplane tender Ballard picked up a boatload of Hiryu crewmen from an open lifeboat, held them at Midway for a few days, and sent them to Pearl Harbor on the 23rd.
The two names appear in an American interrogation report dated June 9, 1942, addressed to the Chief of Naval Operations, and that report is still held today in the files of the Naval History and Heritage Command. For two of the thousands of men the Imperial Navy was making administratively invisible, an enemy intelligence officer in Pearl Harbor is the reason their names survive. Accounts differ on what Tokyo admitted and when. One version says the loss of two Japanese carriers was acknowledged in the press on June 11 alongside the claimed American losses.
The standard account says Kaga and Soryu were announced later as an afterthought. All versions agree on the part that matters here: Akagi and Hiryu were never publicly acknowledged, and the Japanese public, for the most part, did not learn what happened at Midway until the end of the war. The internal files were not entirely accurate either, and that detail makes the picture more complicated. Nagumo’s battle report itself was accurate and candid about Japanese losses, but wrong about American losses.
The report credited the fleet with sinking two Enterprise-class carriers, noted a heavy cruiser seriously damaged, and concluded from those figures that the enemy had been damaged enough to rule out any major operation for some time. Two months later, the Americans landed on Guadalcanal. The service was honest with itself about the four ships it had lost, but deluded itself about the enemy on the same page of the same document, while concealing both from everyone else in the same week. That report was compiled under a handicap the navy had inflicted on itself by losing those ships.
Most of the war diaries, charts, and working papers of the participating ships had gone down with them. The staff reconstructed the battle account from surviving fragments and from what officers still remembered. The same staff, while working on the enemy assessment, noted that the Americans did not appear to have announced the loss of their carriers either. No one was relieved of command over any of this.
Yamamoto and Nagumo both kept their posts after two-thirds of the country’s carrier strength was destroyed. The diary of Admiral Matome Ugaki, chief of staff of the Combined Fleet, shows a man who came out of the battle without any apparent doubt about anything fundamental. Japanese shipyards could not replace those four carriers until early 1945, and by then the American navy had commissioned twelve Essex-class carriers and dozens of smaller ones on top of that. American factories were producing five aircraft for every one Japan built.
For a time, the two records ran side by side. In the public record, there was a great victory on June 10: two American carriers on the bottom, 120 planes shot down, and four Japanese ships that were either afloat, abandoned, or never mentioned. In the other record, the detailed battle report of the mobile force, prepared by the staff that witnessed the battle, listed the failed searches and the delayed launches, and summarized under the commander’s conclusions that our losses amounted to four aircraft carriers and that the occupation of Midway was not carried out. On August 10, Kaga and Soryu were struck from the list.
On September 25, Akagi and Hiryu were struck from the list. By that time, the men who had served on those four ships were already in the Solomons. The men in the isolation wards spent three months without a single visitor, and the fleet they belonged to had already written down in its own hand everything the newspapers were still denying.