Merry xmas

Kasai writes in a letter home “only death can cure a fool. A little change wouldn’t hurt; in fact, one even feels justified in expecting it.”However everyday someone is born and everyday someone dies. Time stops for no one, it flows on with or without you and the earth still spins even if you’re not on it. Compared to the amount of people alive the loss of one life is insignificant and unnoticeable; what kind of change is to be expected? Of course to the ones experiencing such a loss this seems almost cruel; so much is changing for them yet life goes on unchanged. This is what I think Kasai means. Nothing changes or at least not the kind of change they wish to see, one empathetic to them and reflecting themselves. But just because they don’t see the change they seek doesn’t mean all I still the same. After all the only thing in life that doesn’t change is that everything changes.

The war was also mentioned and I believe what Kasai says refers to this as well. War is waged for many reasons but whatever they may be it is expected that after all the struggling something will have changed, what goal was sought will have been achieved and all the deaths and sacrifices will have meant something. But (if it is the World War that is being referenced) Japan lost and nothing has changed; just as before the war life and death proceed as usual.

Question: Kasai mentioned having a wife and children in the beginning so why was he ready to have an affair with his friend’s daughter who is way younger than him?
Or
What do you think it meant that his named was called by his friend as she was dying?