I wish there was a defender decision phase between combat move and conduct combat to clarify these things. Declare kami, scramble and intercept are all effectively done before any dice are rolled.
There is.
Scramble happens at the end of movementphase (as the last thing)
Kami assignment happens as the first ting in combatphase, and are resolved before any combat begins
then you do bombing raids
then you do all your amphibous assault combats
then you do general combat.RulebookE page 16 says
Scrambling is a special movement that the defender can
make at the end of this phase. It must be done after all of
the attacker�s combat movements have been completedRulebookP Page 16
Japanese
player can announce at the beginning of this phase that he or
she intends to launch one or more kamikaze strikes in that sea
zone. They are resolved before any combat begins.
It isn’t as obvious as what I would like. That’s all I’m saying. You have to dig into the nuances of the rules to understand how everything works.