1941, Wednesday 26 November;
They had been anchored here for four days now, but finally, on the fifth day, with dawn just breaking, the signal lamps began to flicker, the fleet maintaining radio silence, and the ships began to raise steam and weigh anchor. 9am they left Hitokappu Bay, in the Kurile Islands and headed eastwards out into the North Pacific. Gradually they began to take station, following sailing orders. An economical speed was set, a steady 13 knots, so as to conserve fuel as much as possible, and also in recognition of the sea states they were sailing in.
A screen of the light cruiser Abukuma and four destroyers led the way, followed by the main body in two parallel columns, flanked by more destroyers. The heavy cruisers Tone and Chikuma led the columns, followed by fleet carriers, Akagi, Kaga and Shokaku on the starboard side, and Soryu, Hiryu and Zuikaku on the port side. Following them were seven fleet oilers, assigned to one of two supply groups, group one with four oilers and group two with another three and joining them all was a supply ship. Lastly at the end of the columns were the fast battleships Kirishima and Hiei.
The presence of the seven oilers was critical, without them, they didn’t have enough fuel to get to Hawaii, and return, as it was, they had barely enough, certainly not enough for any complicated manoeuvres around Hawaii. And the refuelling would also be weather dependant, heavy seas would curtail any such activities. Indeed, if refuelling problems arose on the way there, the plans allowed for a reduced attack force of only the carriers Kaga, Shokaku and Zuikaku, sending the others back. On the return leg, the solution was a more drastic one of sacrificing the destroyers, and scuttling them.
The previous days had seen the aircrews of all six carriers assembled in the flagship, Akagi, where the plan of attack on Pearl Harbour was outlined by Vice Admiral Nagumo. This was followed up with more detail being given, using a mock-up of Pearl Harbour, by Captain Genda, who had planned the attack and Commander Fuchida, who would lead the first wave. Particular targets on the diorama were pointed out, while reference to the present status of warships based there, number of aircraft basing on every airfield and AA gun positions was given. Everyone was given pictures of American ships, islands near Oahu which could be used for forced landings, and told that friendly submarines would be at the marked positions to pick them up if they had to ditch.
Morale was high, all the hard training done in previous months now made sense, the reasons for the modified torpedoes now self-explanatory. The sheer breath-taking audacity of the plan filled them with excitement and pride that their seniors felt they were good enough to do such a thing. For many days coming they would be immersed in the minor details of their own roles in the attack, as they studied their orders.
The plan was to approach Hawaii from the north, appear out of nowhere and attack, and just as quickly, disappear back into the vast Pacific Ocean. On the return leg, back to Japan, they would be met by Yamamoto, and the six battleships, south of the Bonin Islands, and escorted back.
A well planned and elaborate system of false signalling using signalmen transferred from each of the ships assigned to the Kido Butai had been going on for several weeks now, with the ships gradually be phased over, the ships going silent, and an office on shore taking over, providing the US Naval Intelligence with ship transmissions to monitor, enabling the USN, through triangulation to fix the ships roughly in Japanese harbours.
Yesterday Nagumo had hosted a ceremonial banquet to the future victory, with the senior officers of the fleet. It had all ended with a toast from Nagumo, “good fight and good luck” to which the response was deafening. Now, at last, they were off, and for Nagumo, his Flag officers and planners, the next several days would be fraught with worry that they would be discovered, despite staying away from shipping lanes, as the force closed in on Pearl Harbour.