I like your idea, It would at least make up for all the negatives about ijn cvs. Such as horrible aa gun placement and a serious lack of AAW at low lvls. In game they make IJN seem like the horrible underpowered nation but this would really make my games in my Akagi more fun and a few add-ons to your idea. As you know they have at least one upgrade to all aircraft. So if they do actually consider adding kamikaze maybe the first plane will be a explosive loaded zero or something then the ultimate upgrade unlocked at maybe lvl 80-100, around there. Should be the OKHA FLYING BOMB
If possible just to make it fair they are carried by vulnerable
PS: I like your idea and i think they should consider adding jets that were developed around the end of the war such as the IJN: J9Y Kikka, and the US: P80 Shooting Star. This would be a nice edition to the game and would definitely make the game more interesting.