Robert Nadeau (born March 10, 1937) is an American aikido teacher holding the rank of 8th dan and master teacher(Shihan) in the Aikikai.
Nadeau began training in martial arts at the age of 16 and began studying Aikido with American instructor Robert Tan.After Training in Japan with the founder of Aikido, Morihei Ueshiba from 1960-1962 Nadeau returned to Northern California and opened a series of martial art schools sharing space with first Professor Sig Kuferath and then Richard Bunch through whom he has had on-going contact with several notable Ju-Jitsu schools and which eventually led to the formation of the California Aikido Association.
He is one of three division heads of the California Aikido Association and holds a teaching certification signed by Morihei Ueshiba and Kisshomaru Ueshiba.
He is also the founder and head instructor of City Aikido of San Francisco, Aikido of San Jose, and Aikido of Mountain View, CA.
Nadeau is well known as a pioneer in the energy and awareness aspects of aikido, having committed his martial arts career to understanding and translating these principles handed down by Ueshiba into fields beyond aikido, including psychotherapy, personal development, performance, and business.