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O2 Martial Arts Academy
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O2 Martial Arts Academy (formally known as Academia Casca Grossa de Jiu-Jitsu or the Relson Gracie Jiu-Jitsu Aiea Academy) is based out of Aiea, Oahu, Hawaii. We are a Relson Gracie Jiu-Jitsu Association and part of the Relson Gracie Team. The Gracie Jiu-Jitsu and Submission Wrestling classes are led by head instructors Chris and Mike Onzuka, Shane Agena, and Kaleo Hosaka. Chris and Mike were two of only four instructors that were hand picked by Relson Gracie and specifically trained to open Relson's first satellite academy in 1995. Chris, Mike, and Shane are all Relson Gracie Jiu-Jitsu black belts and Kaleo is a 4 Stripe Brown Belt. All of them won numerous state Brazilian Jiu-Jitsu champions and multiple time competitors in the World Championships of Brazilian Jiu-Jitsu (Mundials) and Pan American Jiu-Jitsu Championships. Mike and Shane are also successful competitors in Judo and both have brown belts from the prestigious Shobukan Judo Club. Coupled with its established grappling program, O2 features a top notch boxing and kickboxing program instructed by Kaleo Kwan, Chris Slavens, and PJ Dean. Kaleo and PJ have both held numerous boxing and kickboxing titles as well as are successful MMA competitors. PJ is also a Gracie Jiu-Jitsu purple belt and numerous state GJJ champion. Chris Slavens has an extensive background in amateur boxing, capturing state titles in two different weight classes and has competed in the Amateur Fighting Competition, in addition to being a brown belt in Gracie Jiu-Jitsu. O2 has recently added a wrestling program to round out the disciplines offered. Whether you want to use wrestling to improve your Gracie Jiu-Jitsu game, defend take downs if you are a kickboxer or to get a head start or a step ahead for wrestling in high school, this class is for you. Former Pearl City High School head coach, Cedric Yogi is O2's head wrestling instructor. O2 rounded out its offerings by adding Kali-Escrima to our list of classes. These classes are instructed by Ian Beltran and Erwin Legaspi, long time students of the late, legendary "Snookie" Sanchez. They will add to your hand to hand skills by teaching knife and stick fighting techniques, completing your well rounded martial arts education. We do NOT have an enrollment period. Students are welcome to enroll at any time, even during the middle of the month! We will prorate your tuition if you decide to start in the middle of the month so that you get your money's worth!
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