This article discusses the history of hair dyeing in Japan and its current use as a way to express individuality. It also covers school rules and regulations around hair dyeing, how to comply with school regulations for hair dyeing, what to do if you have already dyed your hair, consequences for breaking hair dye rules, benefits of following school rules on hair dyeing and a conclusion. Hair dyeing has been popular in Japan for centuries but public schools have strict rules about what colors are allowed. Following these guidelines can help students avoid disciplinary action while still expressing themselves through their appearance.