Ryu Spa Kumi Set - care set for mature skin based on fermented plant extracts, probiotics, collagen, ceramides.Ryu Spa Kumi Set Care set for mature skin based on fermented plant extracts, probiotics, collagen and ceramides. Brand description. Ryu Spa is a Japanese brand inspired by the natural wealth of Okinawa. Its formulas use local plant extracts and marine components that gently care for skin and restore its natural strength and radiance. The composition contains purest deep sea water, extracted from a depth of 612 meters off the coast of Kumejima Island.