Can I get a student visa with an old dropped drug charge?

When I (28m) was 19, I was arrested for possession of marijuana and given a notice to appear in court, where I did pre-trial intervention and had my charges dropped. I haven't been in any legal trouble since, and dont use any drugs at all. I have been researching this alot, and I know that legally I can travel to Japan, as I do not have any convictions, but it has been really hard to find any information on if this is going to bar me from any other long term visas.

Does anybody here have a similar experience they can share, or know anybody who has been able to get a student or work visa with a non-conviction drug arrest? Legally, of course, I do not have any intentions or desire to commit any crimes when trying to move. Any details and advice are welcome, but mostly I would like to be able to know if it IS possible for me.