@silvermonarch
It seems these girls are quite likely Japanese settlers in Okinawa, rather than Okinawans (as in the native Ryokun type peoples). Also,by this point in time, most Okinawans were assimilated. I also wouldn't speak for all 120 million Japanese. Through, like most countries (including Vietnam and China), they sure don't respect or care that much about hill people or non-majorities.
I was referring to these girls sufferings in particular, and the suffering of the Japanese civilians anywhere who suffered under bombings. (Like the Tokyo and Kyoto firebombings, for example.)
I'm sure the Author selected Okinawa for a variety of reasons, one being it was a military target with Japanese and US forces present.
Look, Imperialism sucks the world round. Civilians pay the price of their nations choices. In fairness to the Japanese, they didn't do anything the Europeans, or any Empire historically, didn't do. Fuck, even North Vietnam conquered Champa 300 years ago and said "we're going to civilians these un-han barbarians."