I found an IPMS site that explains all the sets far better than I ever could.
http://www.ipmsusa.org/reviews2/ships/details/hasegawa_350_akagi-details/hasegawa_350_akagi-details.htm
Also, you are correct about the aircraft. Hasegawa provides very little......but wait, if you buy now we will throw in......
Luckily they have a soultion for that, You can buy 3 more sets of 12, 3 Zeros, 6 Kates and 3 Vals (plus what comes in the kit) to just almost provide enough Kates for the first wave of the Pearl Harbor attack. 9 (or some sources,10) Zeros, 27 Kates. Just purchasing 5 sets will just cover the second wave of 9 zeros and 18 Vals. See, I said you were lucky, that's why I stoped at 2 additional kits to give an idea of what was on the deck. I invested enough, plus the figures form Northstar and Shapeways.
It's going to be glorious...if I ever start AND finish it.