During World War II Osamu Tezuka, like his classmates, had to endure the riggers of nationalistic military indoctrination. Clearly and thankfully Osamu made a lousy young soldier who didn't care much for drills as he did for bugs : )
During a break he and a friend were hunting for bugs and commenting on their overly ugly, repressive and rather stupid drill sergent. Osamu's friend grabbed a stick and sketched out a comic face of the imperial nutcase, which Osamu critiqued and quickly redrew to a funnier more squshed looking face with a big "stash"
Needless to say the Godzilla Sensei from hell discovered their drawings and quickly subjected the two boys to a ruthless torture of physical fitness drills.
Shinsaku Ban forever honors this snarling, quick tempered beast of the Imperial Army.

"Astro? You forgot your homework! Do a thousand sit ups.......NOW!"