1) The number of islands that hurt Japan enough by their loss to trigger kamikaze is smaller than the area in which they can effectively by used.
2) The sudden loss of Japan itself before the loss of any other crucial territory would leave Japan too much in shock to develop the program.
Other then Japan its self we’re only taking about Formosa.
If Japan its self was taken, then liberated the next turn, there’s no way Jap wouldn’t pull out all the tricks to stop it from happening again (regardless if allies took a particular island or not). Fool me once, my bad, attempt it again and off come the gloves.
The game mechanics allow for Japan to lose its capital, then gain it back (not like that would happen for real). I’m also thinking about the global game. It could very well become an allies strat to simply not go for the trigger islands (to avoid kami’s) just go for the crown. In global it would be possible for Tokyo to fall and not be liberated for several rounds.
I’m not really buying the develop the program theory, because it could be several rounds before a second allied attempt could be taken at the jugular, along w/bypassing the trigger islands. Besides what development, they had an idea to put bombs in planes, and fly them into US ships. The only problem would be finding the inexperienced pilots to give up their lives. I can see not allowing it on the first time allies attack and take Tokyo, but a second attempt they would be prepared for, and would do what ever it takes.