Dianne Costanzo Sensei (4th dan) began her training over twenty years ago as a student of Shihan Fumio Toyoda, founder of Aikido Association of America. It was her privilege and honor to have had Toyoda Sensei as her teacher until his untimely death on July 4, 2001.

Costanzo Sensei is committed to transmit Toyoda Sensei's dynamic Aikido and profound teaching methodology to future generations of Aikidoka.

A number of Toyoda Sensei's students have formed an organization whose intention is to maintain Toyoda Sensei's interpretation and methodology of Aikido. We are proud members of Sosei Aikido Kyokai.