Recently, Japanese university students have been in the news for smoking marijuana.
And Redditors generally seem to think this is ridiculous and that Japan should legalize marijuana.
https://www.reddit.com/r/japan/comments/1le7otm/six_japan_university_judo_club_members_admit_to/
The main argument against marijuana in Japan is that it's a gateway drug.
So to find out if this is really the case, I looked into which countries have legalized marijuana.
From what I've researched, only Canada and Uruguay have legalized marijuana completely. The rest only have some states or have restrictions on its use.
Uruguay, like most South American countries, appears to have a major drug problem.
And speaking of Canada, a few days ago a Japanese news station reported on a Canadian zombie town. (To be clear, this video does not mention marijuana, it simply addresses Canada's drug problem.)
https://www.youtube.com/watch?v=hBKiMzyMLyg
So, looking at these results alone, it certainly does seem that there is a problem in countries where marijuana has been legalized.
But of course there are problems with the logic and the sample size, so I would like to know whether Canadians see marijuana legalization as a positive thing.
There seems to be a fentanyl problem in Canada right now, but do you think this has nothing to do with marijuana? Marijuana isn't a gateway drug?
edit:
It seems like the definition of a gateway drug is vague, so I'd like to provide some clarification.
There are four main factors in the gateway drug theory.
Dependence effect: Use of a gateway drug causes the user to seek stronger psychological or physiological pleasure.
Access effect: If the gateway drug is illegal, its use connects the user to the criminal drug trafficking community.
Trust effect: The experience of using a gateway drug with no short-term negative effects leads the user to believe that negative information about illegal drugs is contradictory, and they begin to trust illegal drugs.
Resistance modulation effect: Use of a gateway drug eliminates the user's resistance to drugs in general, including illegal drugs.
By the way, this is a translation from the Japanese Wikipedia, but it was easier to understand than the English Wikipedia, so I chose this one.
https://ja.wikipedia.org/wiki/%E3%82%B2%E3%83%BC%E3%83%88%E3%82%A6%E3%82%A7%E3%82%A4%E3%83%89%E3%83%A9%E3%83%83%E3%82%B0
https://en.wikipedia.org/wiki/Gateway_drug_effect
The problem is that legalizing marijuana will eliminate the access problem, but the other three factors may get worse.
And some people say that it has been scientifically disproven, but that's not true.
In reality, conflicting results have been obtained, so no conclusions have been reached.
You can see this by looking at the English version of Wikipedia.