from what my father tells me the jap propaganda didn't really stick with the civilians he encountered.
when he was a POW they where often used as slave-labor, sometimes working beside japanese workers, while he was held in japan. (he also spent some time in camps in China, most of this I have to piece together from several conversations since he can't really sit down and talk about it for long)
anyway, back to the propaganda. many of the civilians he encountered treated him very well, often risking severe punishment by smugling a portion of their meal to him or other workers, or giving him small bits of news on the war.
the guards where a completely different type though. often people who weren't fit for combat, so they tried to prove their toughness by abusing the prisoners.
he used to tell me when I was a kid that if it wheren't for the risks some of those people took he likely wouldn't have made it.
as it was he was in bad shape when he got out. (185 lb at the start of the war, 89 lb when released)