@Everyone Sad day, let this be a lesson to you all to never guess the enemy's intentions and always plan based on their capabilities.
Monday, 8 December, 1941
Fine, warm. X-day. The long-anticipated day has arrived at last and while mostly glorious, some major disasters keep my sober. I awoke at 0300 on my own. After leaving bed, I was having a smoke with the chief when Staff Officer Sasaki hurried into the room and reported, "At 0319 wireless TO is being sent repeatedly." With this I knew that the attack order had been issued to the two hundred planes of our task force which had been approaching Hawaii, and the first attack on Pearl Harbor was under way.
Then I confined myself to the operations room and listened with attention to every telegram: "I torpedoed enemy battleship with great war result," or "I bombed Hickam Airfield and got a great war result," which were wirelessed by our friendly planes, as well as enemy wireless mesages which were most interesting, We can see the fighting situation so clearly. Enemy consternation is beyond description. It is their breakfast time at 0320. While they were at their breakfast table, great masses of Japanese planes came like bolts from the blue; I can imagine their utter surprise. The following are some examples to show their uproar:
1. All ships sortie from Pearl Harbor.
2. An order to sweep magnetic and moored mines in the waters south of Ford Island.
3. An order at 0415 - the commander in chief of the Asiatic Fleet will operate according to Operational Plan No.4.
We assume that the second air raid came an hour later than the first one, at which time the five midget submarines were to have attacked enemy ships in harbor. I suppose the enemy took these for mines, which were swept. I shall be very happy if these midget subs will return, but if they don't, who will make public their pains and merits? I regret their efforts can only be estimated by enemy situations at a later time.
Morning Air attack on Pearl Harbor , at 180,107
Japanese aircraft
A6M2 Zero x 100
B5N2 Kate x 144
D3A1 Val x 135
Japanese aircraft losses
A6M2 Zero: 5 damaged
A6M2 Zero: 1 destroyed by flak
B5N2 Kate: 8 damaged
B5N2 Kate: 5 destroyed by flak
D3A1 Val: 11 damaged
D3A1 Val: 2 destroyed by flak
Allied aircraft losses
R3D-2: 1 damaged
R3D-2: 1 destroyed on ground
A-20A Havoc: 14 damaged
P-36A Mohawk: 18 damaged
P-36A Mohawk: 1 destroyed on ground
PBY-5 Catalina: 95 damaged
PBY-5 Catalina: 4 destroyed on ground
B-17D Fortress: 37 damaged
B-17D Fortress: 1 destroyed on ground
B-18A Bolo: 41 damaged
SBD-1 Dauntless: 27 damaged
SBD-1 Dauntless: 2 destroyed on ground
P-40B Warhawk: 50 damaged
P-40B Warhawk: 5 destroyed on ground
F4F-3 Wildcat: 7 damaged
F4F-3 Wildcat: 1 destroyed on ground
B-17E Fortress: 13 damaged
C-33: 2 damaged
C-33: 1 destroyed on ground
O-47A: 14 damaged
OS2U-3 Kingfisher: 3 destroyed
Allied Ships
DM Sicard, Torpedo hits 1, and is sunk
BB Pennsylvania, Bomb hits 4, Torpedo hits 6, and is sunk
BB Nevada, Bomb hits 8, Torpedo hits 4, on fire
BB Tennessee, Bomb hits 10, on fire
BB California, Bomb hits 8, Torpedo hits 3, on fire
BB Maryland, Bomb hits 5, Torpedo hits 2, on fire, heavy damage
BB Arizona, Bomb hits 6, Torpedo hits 3, on fire, heavy damage
BB Oklahoma, Bomb hits 3, Torpedo hits 5, and is sunk
BB West Virginia, Bomb hits 2, Torpedo hits 3
CM Oglala, Torpedo hits 1, heavy damage
CL Helena, Bomb hits 2, on fire
CL Honolulu, Bomb hits 1
DM Preble, Bomb hits 2, heavy fires, heavy damage
CL Detroit, Torpedo hits 1
CL St. Louis, Torpedo hits 1
AR Vestal, Bomb hits 1
CL Phoenix, Torpedo hits 1
CA San Francisco, Torpedo hits 1
DD Allen, Bomb hits 1, and is sunk
Airbase hits 36
Airbase supply hits 1
Runway hits 93
Port hits 18
Port fuel hits 2
Port supply hits 2
On the other hand, our units succeeded in their landings at Vigan and San Fernando and should push out local enemy forces shortly. Paratroopers took Bataan and Tuguegarao so we now have airfields from which to establish local air superiority. Bombers from Formosa achieved surprise and success in raids on Clark Airfield and Manilla, where we destroyed a number of planes on the ground and sunk a number of ships (and submarines) in harbor.
In the Malaya area, our forces reported successful landings at Khota Bharu, Mersing, and Kuantan and the Army believes it will have control of these areas by the end of tomorrow. This is great success! Unfortunately, it comes at the cost of the navy, of course, and this particular incident has caused me and the chief incredible heartburn. CVL Ryujo and her escorts were converging on their rendezvous with Haruna and Kongo when theyw ere surprised by British battleships that seemed to have anticipated our movements out of Singapore. Ryujo and the cruiser Nagara were sunk in the engagement and subequently did not provider air cover for our landing forces. Quite a way to start the way, but better a light carrier like Ryujo than one of our battleships, I suppose! Such failures cannot be allowed to happen in the future against such enemies as we are facing.
The only pleasure to take from this is our battleships currently at Mersing should have a chance to bring their guns to bare on this British force over night and we might extract some recompense. Naval bombers will be set for naval strike tomorrow (it's unfortunate they were slated for a surprise raid on Singapore today!"
At 1000 I called in the skippers and chiefs of staff of the ships and had our staff explain the way situation to them as far as possible. I also gave them instructions concerning the forthcoming operation the Main Body was going to take.
At the present, barting the disaster near Mersing, the war situation is progressing at a favorable pace. At 1045, a Privy Council was held and the Imperial Declaration of War against England and the United Stated issued. After this, His Majesty summoned the ministers of the army and navy, giving a special message to the fighting men; the two answered him for all those men.