The Japanese treatment is permanent straightening gets curly hair straight over 75% to or more, the Kera Smooth is a hybid of the Japanese and the brazilian keratin Demi permanent relaxes curly hair up to 50%, the Brazilian Keratin is a Semi permanent only smooths out frizz and relaxes the curl about 25% if hair is color treated it also is a non chemical treatment(keratin) while the others have some chemical (Sulfur based) factors.