One of the POW books I read had a story where the prisoners were allowed to send censored mail back home, telling about how great they were treated by the Japs. One guy wrote "I was 160 pounds when I was captured, now I weigh almost as much as Jimmy."
"Jimmy" was a nephew who weighed 90 pounds.
Many of these POWs died at an early age because the abuse they went through crippled their bodies and immune systems.
As did mine! My father was for the most part very close-mouthed about the war, and particularly his captivity. Like yours though, he was very respectful and grateful to the Filipinos. They risked their lives to aid the Americans, and my father credits them with saving his life by smuggling a few cans of condensed milk to him when he was ill and had nothing to eat or drink for days while enroute from Bilibid prison to Cabanatuan 3. The story of the courage of the Filipinos then is yet another sadly untold story of that time.