YOON Nak-joon (4th Dan) is the Dojocho of Aikido Ansan dojo

and serves as the President of KAU. He started Aikido in 2003

and opened the Ansan Dojo in 2009.

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YOON Nak-joon was a staff at the 2019 World Martial Arts

Masterships in Chungju, which were directed by the International

Aikido Federation. He has been working in marketing management

in the corporate world for 15 years and is currently running an

educational agency business for companies and corporations.

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He continues to balance his professional career with his dedication

to Aikido, contributing steadily to both fields through long-term

practice and organizational involvement.

SUNG Ju-hwan (5th Dan) is the Dojocho of Aikido Samsungdang

and serves as the Vice President and Technical Director of KAU.
He is a police officer (1999) and participated in the modification

of Korean Police Arresting methods in 2005. In 2006-2007,

Sung Ju-hwan served as an UNPOL (UN Police) in Timor Leste,

where he was dispatched as a close protection officer of the

nation's president. He also taught Aikido and Police arresting

methods to local officers and civilians, which was commended

as an excellent example of community policing.
SUNG Ju-hwan was a delegate to the 2013 World Combat Games

in St. Petersberg, Russia, and a staff at the 2019 World Martial Arts

Masterships in Chungju, Korea. Events were directed by International Aikido Federation.