Dr. Kaoru Tsujii is one of the pioneers and leaders in science and technology of the surfactants. He has long explored the field covering both theory andindustrial applications. Tsujii received both his Master of Science degree and his Ph.D. from Osaka University. He has been employed by Kao Corporation, a leading manufacturer of consumer products in Japan, since 1970, where he is currently a Research Fellow. His areas of research include ididescent solutions resulting from periodic structure of bilayer membranes, super water- and oil-repellent surfaces utilizing their fractal structure, hybrid polymer gels with bilayer membranes, and interactions of surfacants with polymer gels. Dr. Tsujii has published over 50 papers and has authored 14 books and chapters. He has applied for 76 patents.