This article from BBC News discusses the liberation of British servicemen from Japanese P.O.W. camps:
You may also be interested in the 2014 film Unbroken. From Wikipedia:
"The film stars Jack O'Connell as USA Olympian and army officer Louis "Louie" Zamperini, who survived in a raft for 47 days after his bomber crash-landed in the ocean during the Second World War, before being captured by the Japanese and being sent to a series of prisoner of war camps."