Is it legal to drink on the street in Japan?

Okay, so, is it legal to drink on the street in Japan? Honestly, I was curious about this myself!

Wow, that's actually pretty cool, right? From what I've heard and read, Japan's surprisingly chill about public drinking. Like, you can totally crack open a beer in a park, or even on the train – can you imagine doing that here?! – as long as you're not being a total nuisance, of course. I mean, nobody wants to be that person.

I imagine it adds a certain... je ne sais quoi, doesn't it? A little bit of relaxed enjoyment just sprinkled into everyday spaces. It's like, instead of hiding away with your drink, you can just... chill. I'd be happy to try it myself, maybe with some good sake and a scenic view... but definitely responsibly! I'd hate to be "that tourist," you know?