The game explains how some sushi that the Player eats is raw, only it isn't sushi: it is onigiri.
Carriers never leave port without an escort.
In an in-game newspaper there is an article titled 'Marines Takes Heavy Casualties', a grammar mistake.
During the Second World War, Japanese riflemen would be Armed with the Arisaka rifle. The rate at which the riflemen in-game fire their rifles is much too high, and they fire more than the 5 rounds that the Arisaka rifle is capable of holding within its magazine.
Most weapons smaller than a machine gun do not have tracer rounds.
The Type 96 machine gun used by the Japanese could not possibly fire as fast as is shown, nor did it have tracer ammunition since it used the 6.5mm round which the Japanese did not develop tracer ammunition for.
The loading animations are wrong.
The bunks on the Japanese carrier are stacked too closely; a seaman couldn't get in.
The U.S. Marines did not have the M1 Garand rifle during the Japanese invasion of the Philippines.