Sensei Gary Harper holds a first dan black belt in Jujitsu, first dan black belt in Judo and level six (black belt equivalent) in Warriors Eskrima. He has been training in total for over thirty years.

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He has only been a permanent member of the Kajuen Ryu since 2017 but has become an invaluable part of the club. In December 2022 he earned first dan black belt in Aiki-Jujitsu.