According to Skin Types Foundation Selection.
I have very frizzy hair, and after many years agonizing over the hot iron and the blow dryer, I decided that Japanese hair straightening would provide a solution. However, in the end, the results did not satisfy the objectives of the procedure.
One of the processes used to achieve straight hair is the Japanese Hair Straightening technique. This procedure involves the use of strong chemicals that work to make the hair straight for an extended period of time.