Apparently to defend the Japanese home islands they didn't just have Kamikaze planes, but also Suicide divers ready to destroy any allied landing craft.

Combine this with training women and children in hand to hand combat with the goal that they each kill 1 invader before they shall perish. . . The Japanese really were ready to throw the kitchen sink + Any chance of survival at the Americans. (In last weeks episode, the goal of the Japanese govt was to be prepared for the 100 million massacre.)

https://www.youtube.com/watch?v=zb9k5LcNWJM