LONG BEACH, Calif.--(BUSINESS WIRE)--Obagi Medical Products, Inc. (Nasdaq: OMPI), a leader in topical aesthetic and therapeutic skin health systems, today announced an expansion of its relationship to Rohto Pharmaceutical Co., Ltd., (TYO:4527) a leading brand manufacturer of over-the-counter products, and Obagi’s leading marketing and distribution partner, in Japan. Together, the Companies will launch a series of products with ELASTIderm™’s technology into consumer sales and distribution channels in Japan, including premium retail distribution channels, as well as jointly develop other scientifically based skin care products for the Japanese market.