GRKAS is affiliated with the following karate organisations.
Jitsueikai is a Goju-ryu karate training institution in Osaka, Japan.
Japan Karate Federation Goju-kai is a national governing body of karate in Japan.
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Karate-Do Union of Singapore (KUS) is a non-profit organization that promote karate in Singapore. KUS strives to invest in karate athletes so that Singapore can be represented in the regional and the world karate arena.
The World Karate Federation is the largest international governing body of sport karate. It is the only karate organization recognised by the International Olympic Committee.