Two interesting statistics that may be relevant:

  Homeless per 10k rate [0]
  Japan: 0.3
  USA: 17.6

  Rate of intentional homicide victims per 100,000 inhabitants [1]
  Japan: 0.3
  USA: 6.3

0 - https://en.wikipedia.org/wiki/List_of_countries_by_homeless_...

1 - https://en.wikipedia.org/wiki/List_of_countries_by_intention...