The two machine guns are removed from the right side of the plane but are seen firing what attacking Godzilla.
Japanese pilot lands his plane while still having a live bomb attached to his airplane. The normal procedure is to dump all live ordinance in the ocean before landing to avoid accidental detonations.
From 0:01:07 -the airplane comes to a complete stop after using, perhaps, 100 feet of runway.
The airplane that Shikishima flies is translated in english subtitles as a jet, it's obviously propeller-driven. The translation is wrong.
At 0:22:34 -the kamikaze were aircraft-carrier based. The pilots were in the Japanese navy.
Pay close attention to the people during the rampage in Tokyo and you'll see various CGI doubles start floating as animation errors.
During the first dinner scene at Shikishima's house, baby Akito is staring at the camera.
Early in the movie -it is not explained how Godzilla is able to stand upright while attacking the large ships.
Kamikaze pilots were locked into their airplanes. They were expected to die in honor for Japan. Any pilot who survived was shamed and was expected to commit suicide (commonly referred to harakiri in the West) .
Throughout -many Japanese acknowledge their orders by responding: "Roger!".