I have watched Tora Tora Tora about a dozen times, second only to a great western, The Outlaw Josey Wales which I have watched 15 times or so.
I agree with your observation that it is a good movie. The actors played the actual participants in the Attack.
As an aside there are a lot of Josey Wales fans at FR.
We once had a series of posts about how many times Josey spit tobacco on his dog! :) I was off by one.
When my Daughter was young, she got mad every time he would spit on the dog. She loved dogs.