[yamtaddle]

I know it's not exactly a reliable record, but Japanese high school anime are a popular genre and pretty consistently depict a fairly intense atmosphere of bullying. It's often not the focus so you have to read between the lines a bit in some of them, but it's usually there. Not sure how much of that's true and how much is fictional trope.

[anotherman554]

I'm not sure what you mean by Japanese high school anime? Some anime, particularly in the slice of life genre, depict a idealized version of high school where there is no bullying.