Spelling mistakes are present in the subtitles.
The towel that Ayane wraps around herself at the massage parlour has no seam when she turns around.
The enemy soldiers in the cutscenes are holding their weapons in their left hands. While it is possible that one or two soldiers may be left-handed, it is highly unlikely that they all will be left-handed.
Ryu states that he took care of the helicopter on the island when there were in fact several helicopters.
After the battle with the fleet, Ryu wakes up on a ship which the text calls a cruiser, but which Mizuki calls a destroyer.