The third Japan-U.S. Seminar on Bioorganic Marine Chemistry was held 3-8 July, 1994, in Numazu, Japan, sponsored by the Japan Society for the Promotion of Sciences and the U.S. National Science Foundation. Japanese organizers were K. Tachibana and N. Fusetani (University of Tokyo); the U.S. organizer was K.L. Rinehart (University oi Illinois, Urbana-Champaign). In attendance were twelve Japanese participants and fourteen Japanese observers, nine U.S. participants and one U.S. observer, and two Japanese student assistants.