There are many situations where Dainippon-kun of the Great Spirit is completely destroyed with just one gun.
(On an island where supplies have been completely cut off, try to outwit the opponent / Shut up and charge the Yamato battleship with one destroyer / Win Midway by dragging out a half-wrecked aircraft carrier)
The claim that the U.S. military lacks mental strength has been around since the Japanese military evaluated the U.S. military before World War II, but isn’t that just wishful thinking?