Not that it'd necessarily stop her but I think that stuff is a bit more regulated in Japan.
I didn't know that, so I looked it up. Apparently, homebrewing over 1% ABV is illegal, yet the practice is stupidly common and people sell homebrewing kits anyway.
Generally speaking, it's impossible to regulate homebrewing, so most countries that have laws about it only have them so that they can slap you with something on top of whatever else they're actually going after you for. The most they can do is make it hard to buy equipment, but in the case of homebrewing, the equipment for it is basically the same as the equipment for pickling, canning, brewing coffee, and other such endeavors. There's no point in trying to stop it; that's why the only times in history where it's happened in earnest have been moral panics.
Still crazy that apparently people in Japan will have meetups and contests where they share homebrews, as if it's a potluck, or a baking contest. That makes me think the laws really are just on the books for if they want to crack down on you for something unrelated. But, cursory research makes that just a barely-educated guess.
Anyway, it's easy and fun to make free booze at home, and the government can't really stop you no matter where you live, so have fun y'all