>>40 (OP)
An excellent source is Yukio Mishima's death poems and writings. He was deemed unfit for service, including some buried aspirations to be a kamikaze pilot. He admired them and took inspiration from them. If anyone studies the man and especially the circumstances of his death many years after the war, they'd know he was more than capable of being one.
On top of this, he was already a remarkable writer and poet from the years when he would have been called to service and carry out his duties if allowed.
散るをいとふ世にも人にもさきがけて 散るこそ花と吹く小夜嵐
A small night storm blows / Saying “Falling is the essence of a flower” / Preceding those who hesitate.