Learn how to torp a CV or any of sea going craft with either d3a or TBM and youll soon learn that to improve accuracy and success of hitting the craft you have to get quite close,, sure you can flip the torp from some distance if you chose but thats a low percentage attempt.
The point being, this type of attack on CV is practically a Kamakaze mission in its self , with a higher degree of skill involved than simply plunging your ride into the CV.
Japanese pilots that were assigned to the most "honourable duty" of self sacrifice were usually not very accomplished flyers, I recall in one japanese aces account with over 80 kills to his name that he requested a kamakaze mission and was refused as pilots of his calibre were not permitted to be used in such a way. It therefore appears to be a desperate attempt to cause accurate damage forgoing the life of one inexperienced pilot. There are far more effective ways of destroying carrier groups in AH, with greater success and minimal loss of "life". It saddens me to think of the mindset and senseless loss of young lives that this technique employed. These poor chaps were primed on sakae then Hard Bolted into there cockpit, and sent on their way with just enough fuel to reach target, with a few escorts whose orders were to protect the pilots to a certain point, and to kill them if they did not carry out the task. <<Food for thought.