Sadaki Nakabayashi (September 14, 1916 – September 29, 1977) is a former judo teacher and author.[1] Nakabayashi authored a number of judo books including Judo, (Athletic Institute series) in 1968, How to Improve Your Judo in 1960, Fundamentals of judo in 1964.[2] He also wrote the book fundamentals of Judo along with George Uchida and Olympic Coach [3] Yoshihiro Uchida[3] Nakabayshi taught for a period at the Kodokan.[4] Nakabayashi is considered to be one of the best Judo instructors to have been sent to the United States.[5]