The Masters of Chayon-Ryu are those black belts who have shown dedication for more than 25 years. They are the leaders of Yudanja-Hoe (Chayon-Ryu Black Belt Association) and mentors to the rest of the Chayon-Ryu students.
Master Santiago Rangel
9th Dan Black Belt
Promoted December, 2017
Chief Instructor, Rosenberg Chayon-Ryu
https://www.kimsookarate.com/the-masters