Recently, some Japanese hostages were returned to their homeland, and that's good news. But then the news station talked about how poorly they are being received back home. Part of that is due to some of them being peace protestors.
What follows is some speculation on why. Some of the pro-war element called them traitors; I wonder if the anti-war protestors were being overly helpful to their captors.
Another point, during WWII the Japanese worldview held that being captured was dishonorable. Death was preferable. I wonder if some of that is still hanging around, in possibly mutated form, and influencing their reaction.
Its also been suggested that if a Japanese person leaves the safety of the Home Islands, and brings dishonor to the nation, that this causes disdain to the person who left.
I'm not sure what's going on, but there's my analysis.