Hair restrictions, in particular, started in Japanese colonialists between 1910 and 1945. It's because school wants to restrict students from the freedom of making their own choices and according to the school’s management, no aspect of a student’s appearance should deliberately draw attention to him/herself. In 1982, many schools are considering the regulations in their own discretion while some others implement this strictly. So it's a very controversial problem and issue between students and teachers.
Personally, I want to have a long hair. What do you think about the hair restrictions in Korean school?