Most people who are junkies became junkies because they have no communities to be part of and they're bored. If a town has a strong community, there are lots of things for everyone, including teenagers and the elderly, to do, and if family members keep in touch with each other, then no one in that town will take heroine. Some people in that town may try it out, and then never take it again because they don't want to.

Look at western civilisation and you will see why there are a lot of junkies and hobos in these countries. Communities are dead, cost of living is going up, feminists tell men and boys that we suck, race baiters shit on white people, single motherhood is too common and there is too much government regulation. Which is why people take drugs. Meanwhile in Japan, virtually nobody takes drugs. Japanese women are nice, there is no race baiting, degeneracy happens only behind closed doors, the economy doesn't suck as bad and families and neighbours are cherished. Japan has a lot of problems, but nowhere near as bad as any western country. So drug use there is down.

Furthermore, doctors are government-sponsored drug dealers.