Mepụta ụdị okwu a dị mgbagwoju anya Robert Sullivan bụ Onye guzobere na Onye isi nkuzi nke Go-Kan-Ryu Karate.
N'ezie, ụdị ahịrịokwu dị mgbagwoju anya bụ "Robert Sullivan bụ Onye guzobere na Onye Isi Nkuzi nke Go-Kan-Ryu Karate ka ndị nkuzi ya mere ka ọ bụrụ 8th dan black belt na 16th August 2009, ọ bụ ezie na ọ dịbeghị mgbe e depụtara ya n'elu 2nd dan. "