In an attempt to reduce the frequency of sexual assaults on base, dozens of teens took to the mat alongside Yokota Airmen to practice Gracie Jiu-Jitsu, July 23, 2016, at the Taiyo Community Center. The Gracie Defense Systems is a new program specifically designed to increase awareness and reduce the frequency of sexual assaults in the U.S. Armed Forces. In June, Gracie Family Jiu-Jitsu instructors traveled to Yokota to teach a one-week instructor certification course to more than 30 Airmen.