My father had the "joys" of being a guest of the Japanese Emperor for 3½ years after the fall of Singapore. He told us about his capture, his liberation, and a story about how the starving POWs in his hut survived (one would "escape" at night on a weekly rota, kill something in the jungle, drain its blood into billycans, and "unescape" before dawn with the congealed blood that they would share, ugh, ugh, ugh). Other than that, pretty much silence except on one occasion: he talked to his cousin who had been in submarines in the Pacific one weekend. My brothers and I were all little boys at the time - it is a regret we all feel that we went off to play, and therefore have no recollection as to what was said. Both he, and his cousin, are long dead so we have no way of knowing ...
