Bachelor of Science in Engineering, Yokohama (Japan) National University, 1963. Master of Science in Chemistry, Ohio State University, 1968. Doctor of Philosophy in Chemistry, Ohio State University, 1971.
Assistant engineer, Noren Sugar Mill, Gushikawa, Okinawa., 1963-1964; chemistry teacher, Okinawa Technology High School, Naha, 1964-1966; teaching assistant, Ohio State University, Columbus, 1968-1971; postdoctoral associate, U. Hawaii, Honolulu, 1971-1975; associate professor, U. Ryukyus, Nishihara, Okinawa., 1976-1982; professor marine science, U. Ryukyus, Nishihara, Okinawa., since 1982. Consultant Harbor Branch Oceanographic Institute, Fort Pierce, Florida, 1985-1986. Vis.prof. U. Copenhagen.
Member American Chemical Society, Chemical Society Japan, Pharmaceutical Society Japan, American Society Pharmacognosy.
Married Tomiko Hokama, August 12, 1965. Children: Takenobu, Akiko, Kenji.