Since the implementation of The Criminal Code in 1907, Article 175 forbids distributing "indecent" materials, it is believed that most pornography in Japan must be at least partially censored. The primary means is to put a digital mosaic over genitalia.
historicaltimes: Protesting the high school dress code that banned slacks for girls, Brooklyn c.1940 via reddit
In east asia there is no dress code for the streets. Bimbos often choose the high heel and denim hot pants combo that guarantees seductive walking and ass movement, maximum leg exposure and of course the excuse and opportunity to display their ass cheeks