Corrected entry: A group of Japanese soldiers, standing in a small circle in a cave, commit suicide one at a time, using grenades. Each grenade harms only the solder pulling the pin and no-one else. In reality, every grenade would have wounded and perhaps killed everyone in the group.
Corrected entry: A group of solders, standing in a small circle in a cave, commit suicide, one at a time, using grenades. Four suicides are seen on camera. The time from arming the grenade to the explosion is less than two seconds in first, second and fourth suicide and about three second in third. Clearly, no army would equip it's soldiers with grenades that would explode faster than they could be thrown.
Corrected entry: At the beginning of the film, the Olympic athlete says that his horses name is "Uranus" but later when the horse is killed in a bombing run he calls the horse "Jupiter".