After arriving on Kotojima, Tora-san looks at a map of the entire island and asks a passing police officer:
“Are there any thieves on this island?”
“No, there aren’t any.
There are no such people here.”
It is an island whose population can literally be counted, and this scene also proves the correctness of my “theory of evildoers.”
The number of evildoers is determined by their proportion within the population.
That is why those who live in large cities must never neglect to remain vigilant in every respect.