Uh John...in the video you posted, the US Marine interviewed, Lt. Snelson, is wearing the same uniform pattern as the guys in the picture above.  The Japanese marines have a completely different one.  Also, they don't have M4s, they're carrying full-size rifles.  M16 or M27 I don't know, but very obviously not carbines.

And, of course, it's quite obvious that the guy just below on the beach is haole.  Even the one in the front doesn't look Japanese.  Remember the first rule of holes.