Japan bashers and lovers alike have levelled all kinds of beastiality and brutality done by the Japanese defenders of Iwo and Oki but for some reason, Clint chooses to side skirt the issue ("it didn't happen") or change it ("look, we were kind"). The incident of the later Clint portrays as a wounded marine is taken prisoner and the kindly Japanese infantry captain exhorts his men to care for the wounded marine, even going so far as sharing with the marine that he travelled to the USA and enjoyed his trip.
The marine conveniently dies of his wounds and indeed, historically no "complete" (ie; 'free from mutilation') marines were ever recovered from the Japanese caves. So Iggy's death in Flags Of Our Fathers is the accepted "death" that befell marines wounded/captured in my book. An air force manual jokingly (but truthful) exhorts air crew not to bail out over cities they've just bombed. So for that reason, I would not expect the flame-throwered survivors to be too compassionate with a wounded marine.
In Yamato, Iwo is a done deal and Oki's outcome is as well. The division captain shuts up serious historical mutiny with a speech that is so typically Japanese but the speech actually took place. I won't spoil it, but the speech makes so muck f**king sense I'm surprised I hadn't caught it before in my brain. The way that it shuts the dissenters up is equallyl gripping.
Clint's "Letters" has a second disk with tons o' features on both the filming of the movie and the actual battle. Yeah, it's nice to see a movie about the "other" side's perspective, but the movie comes pretty close to being apologetic with a Japanese slant. In other words, poor Japanese being bullied for no reason. Anyway, I'll dig through my spare movie collection and see if I have them laying around...