Literally how? Trannies are a result of inceldom, lack of father (either from being raised by a single mom or having a cuck of a dad), pornography, and high mutational load, with social and physical pressures as a catalyst. No one becomes a tranny simply by watching anime (unless Japan really is playing the long game for revenge...) Now a lot of trannies do watch anime, but that's because of them being social outcasts and autists before deciding to become freaks. It's not the other way around, it's just popular amongst those two groups, who are at a higher chance of becoming trannies regardless.