Yuji Yamashita is an Associate Professor at the Faculty of Pharmacy, Chiba Institute of Science (CIS), Japan. He received his Ph.D. in natural science from Bayreuth University, Germany, in 2005, plus an M. S. and B. S. from Yokohama National University, Japan. After several years of research work on the thermotropic liquid crystals in industry laboratory at Chisso Petrochemical Co., Japan, he began to study dermatology, especially transdermal drug delivery system, as a post-doc at St. Marianna University, Japan. Since October 2011, he has been engaged in teaching and research concerning cosmetic science as an assistant professor at Chiba Institute of Science, Japan. The area of his expertise is the surfactant science such as phase behavior and self-assembly which is related to formulation technology.