I am reading the book "Shattered Sword" and it states that Yamamoto "rebuked" Nagumo after Pearl Harbor. I thought Pearl Harbor was considered a great success? Anyone know why Yamamoto thought it necessary to reprimand Nagumo? TIA

  • I believe this topic has been explored extensively if sometimes inarticulately at alternatehistory.com. I believe the general consensus there to have been lack of capacity to inflict strategic damage while preserving a force in being. – Samuel Russell Dec 26 '18 at 7:23

Essentially for failing to carry out a third attack. Wikipedia (my emboldening):

In the end, five American battleships were sunk, three were damaged, and eleven other cruisers, destroyers, and auxiliaries were sunk or seriously damaged. The Japanese lost only 29 aircraft, while 74 were damaged by anti-aircraft fire from the ground. The damaged aircraft were disproportionately dive and torpedo bombers, seriously impacting available firepower to exploit the first two waves' success, so the commander of the First Air Fleet, Naval Vice Admiral Chuichi Nagumo, withdrew. Yamamoto later lamented Nagumo's failure to seize the initiative to seek out and destroy the US carriers, absent from the harbor, or further bombard various strategically important facilities on Oahu. Nagumo had absolutely no idea where the American carriers might be, and remaining on station while his forces cast about looking for them ran the risk of his own forces being found first and attacked while his aircraft were absent searching. In any case, insufficient daylight remained after recovering the aircraft from the first two waves for the carriers to launch and recover a third before dark, and Nagumo's escorting destroyers lacked the fuel capacity for him to loiter long. Much has been made of Yamamoto's hindsight, but, in keeping with Japanese military tradition not to criticize the commander on the spot, he did not punish Nagumo for his withdrawal.

which suggests the criticism may have been somewhat unjust.

The "strategically important facilities" included fuel stocks:


he was later criticized for his failure to launch a third attack, which might have destroyed the fuel oil storage and repair facilities. This could have rendered the most important U.S. naval base in the Pacific useless, especially as the use of the submarine base and intelligence station at the installation were critical factors in Japan's defeat.

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    The attack started at about 8 AM and both waves were over by about 10 AM. Thus there was plenty of time to carry out a third wave. I have read that the Japanese pilots wanted a third wave because they had seen other targets (fuel storage tanks, drydocks, submarine pens, etc.) but that Nagumo refused because he felt he accomplished his primary mission (attack the batteships) and did not want to risk his fleet in case the US carriers showed up. This was typical behavior of Japanese officers during the war: sticking to their mission and not be willing to take any chances. – Barry Dec 26 '18 at 3:11
  • @Barry, on the other hand all that accomplishes is make WWII bloodier. December 7 was a total loss for the Japanese. Even if they neutralize Hawaii altogether they will be crushed by overwhelming power. – Joshua Dec 26 '18 at 3:17
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    @Barry The raid was over at Pearl Harbor by 10 AM. It took time to fly back to the carriers, which were prudently staying far away. The time to land all the aircraft, patch some up, form up an attack, launch, and recover would have had at least some recovery taking place after dark, which Nagumo wanted to avoid. (H.P. Willmott, "Pearl Harbor"). – David Thornley Dec 26 '18 at 18:14
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    @Barry The Japanese launched the strike force in two waves. They didn't launch one wave, wait for it to return, and then send out a second wave. The entire strike was too large to launch conveniently at one time. Also, attacking the dockyard facilities would likely have been futile (I'll try to dig up the appropriate reference when I get home). – David Thornley Dec 27 '18 at 17:47
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    @DavidThornley: I believe that you are right about the objective reality that the "attacking the dockyard facilities would likely have been futile," but the question was about what YAMAMOTO thought. That is, if he (the boss) had thought one way, he would have reprimanded Nagumo, even if Nagumo was factually correct. – Tom Au Jan 5 at 17:43

Because Yamamoto was one of the few admirals in the Japanese fleet that understood the importance of logistics. Other Japanese admirals, such as Nagumo, measured their success by the damage to enemy warships.

Specifically, Nagumo was satisfied with his two strikes, which blew apart the battleship USS Arizona, and severely damaged all but one of the other seven American battleships. That put the U.S. Pacific Fleet out of action for some time.

But Yamamoto wanted Nagumo to make a third strike to destroy the fuel supplies and dock facilities. That would have done more damage to the American Pacific effort than the loss of its warships.

Yamamoto also reproached Admiral Mikawa, who won a victory at Savo Island, for the same mistake. Mikawa sank several allied cruisers with a midnight surprise attack, and then left the scene. But Yamamoto faulted Mikawa for not destroying the Allied transports, with their supplies and reinforcements.

Yamamoto understood better than other Japanese admirals that the whole purpose of defeating enemy warships was to earn the right to destroy their "soft" targets. The other admirals felt that sinking enemy ships was "enough."

  • Do you have evidence that Yamamoto wanted a strike on the port facilities? Could you please supply a source, other than an unsourced article on a website? From what I've been able to figure out, the Japanese were unconcerned with shore facilities at the time, and there's been a lot of retconning once Western naval historians started asking. – David Thornley Jan 2 at 19:06
  • The source is the Pearl Harbor Museum, commerorative tour, etc. I consider that reasonably authoritative. – Tom Au Jan 3 at 3:14
  • In Alan Zimm, "Attack on Pearl Harbor: Strategy, Combat, Myths, Deceptions" (my favorite book on Pearl Harbor, because it agrees with what I'd been thinking), pp. 301-308 are about the third strike discussion and that it would not have been against shore facilities, and pp. 308-321 are about why attacking the shore facilities would have been mostly futile. On p. 114, it says the Combined Fleet Operations Order #1 put port facilities after anything that flew or floated in the priority list. Willmott, "Pearl Harbor", has more on what went on, but my copy is currently unavailable. – David Thornley Jan 5 at 17:11

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