@GARE Honestly it feels quite real for me
I live in France, and there have been many cases of gang war in the suburb of Paris, and it isn't some teenager just beating the shit out of them. It is teenage kidnapping girls to pimp them and rape them, armed robbery, case of litteral slaughter.
It doesn't happen everyday surely, but last time a story like that was a teenager trying to rob drugs from 3 dealers, but he got smashed, after he got smashed, he got somes of his finger cut down, he was beat the shit outta him, and lastly thrown into a river
Another one that is quite known because it happened with a well known french rapper, is his crew and him beating someone up in the street, chopping off his nose, his testicles, knock him out continuously, and drive over him with a pick up
And I don't talk about my region which is Corsica (just check out the corsican connection and the corsican mafia), one story about my region is some people robbing and beating a pizza deliver, because they wanted pizza, or a guy from my neighborhood trying to rob a bar just because he was bored
So honestly it doesn't surprise me that it could happen in Japan where Yakuza and bosozoku are way more open in terms of visibility