I just went through the first couple of minutes of this movie so far but this is the first time I've ever seen bolt action Japanese rifles firing in semi-auto mode and I think one was in full auto by the look of it. You'd see the Japanese jerking the rifle and a GI go down then he'd jerk again and you hear it fire again funny thing was his hands never got near the bolt. A bit of semi might have been ok as one of their rifles kinda looked like a Garand but the look was so quick I'm not totally sure.

What the hell. It was a great movie, just great.
Yes, the first minute was cheesy but the rest was great.

Yeah, it's a pretty cheesey flick, but I give it an extra star because it has Roger Corman in his first PURE acting gig as the sergeant at the end.
He'd appeared in other movies that he'd produced and/or directed, always in throwaway parts like this, but he had nothing to do with the making of "Battle of Blood Island."

....It's Chop Suey Hooey..!