NJ Ronin is dedicated to creating a welcoming atmosphere for all visitors. Located in Hackettstown, NJ we are warren county’s newest academy specializing in Jiu Jitsu and Striking (Boxing and Kickboxing).We provide classes for the entire family 6 days a week. Private lessons and personal training are also available and can be scheduled around hours that work for you. Your first class is always free and beginner friendly. Come visit today to see the difference for yourself.