Abstract
It is indeed a great honor to receive the Oceanographical Society of Japan Prize (1983) for the study of oceanic turbulent diffusion. For this award I owe a great many people inclusive of my teachers, colleagues, and friends, who educated, encouraged, and supported me during the long period of research on oceanic diffusion. I am very grateful for all of these people, not mentioning individual names. In particular, I wish to express my sincere appreciation to Professor D. W. Pritchard, without whose guidance, support, and understanding the work would not have been accomplished. Thank you very much, Don.