Japanese permanent hair straightening is one of the most popular straightening techniques used for more than 10 years to make hair permanently straight our japanese hair care system is effective on curly frizzy and wavy hair asian and european hair even the most unruly hair will be easily manageable and straight after this japanese treatment depending on thickness and length of hair the process will take 3 8 hours as a result you will get perfectly straight silky and shiny hair witho