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See all ads on AdLibrary →Decorté (officially Cosme Decorté) was launched by Kosé Corporation in Tokyo in 1970. The brand is Kosé's flagship prestige line, known globally for the Liposome Advanced Repair Serum — claimed to be the world's No.1 selling serum for 30 consecutive years. Decorté distributes through department store beauty counters, travel retail, and its own DTC platform. China and Japan are its two largest markets.