Do you need evidence that Japan have low crime rate? Or you just want to avoid giving proof of your statement?
The evidence is in relation to the impact of game content on children, not the low crime rate.
I have already said that I don't have any 'serious research' into the subject. I can't be more open about this.
You are making sweeping statements as if they are objectively true. They aren't.
My position is that this game content has some impact on child harm, even if minimally, something your own word choice adheres to.