Oversexualization at workplace?

Im probably the most normal looking woman ever but what i have to face daily regarding sexualization is insane. I never faced a similar thing back in Europe.
Im an English teacher but i speak full Japanese and i can fully catch the things they say about me, not even mentioning the times its said in English or its physical.
My question is that is this normal? Is this a part of what comes with living in japan or is my working place/ coworkers/ students uniquely toxic?
The reason im asking is that i was thinking of quitting, but then i dont wanna quit and find myself in a similar working environment again.
So in case of this being normal i guess i gotta make myself bullet proof
Any advice is appreciated

by Virtual-Worry-1507