Located at 110 Grand Ave in Hackettstown, NJ

A Place For The Rest Of Us

to Grow.

the way of the ronin

NJ Ronin is a collection of new and seasoned  Jiu Jitsu practitioners, MMA fighters, boxers, and kick boxers who have been searching for the right training atmosphere. Ronin literally means, “he who drifts/wanders”. Ronins were made to feel like outsiders that didn’t belong. If you’ve ever felt like you didn’t fit in or just never really felt comfortable at a gym or another academy we would love to welcome you here with open arms. Come be a part of our family and wander no more!

Your Vibe will determine your


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, Striking (Boxing, MMA and Kickboxing) and Self Defense. 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.

View the schedule

Work Hard



Our Jiu Jitsu classes are taught by highly qualified bjj practitioners with diverse backgrounds, techniques, and perspectives whose primary goal is to help you reach your full potential.

Children’s Jiu Jitsu

We offer childrens Jiu Jitsu 4 days a week! Ages 5 to 15 are welcome to come have fun being with a group of passionate bjj practitioners. Get your kids off their cell phones and onto the mats!


Home of the American Strikers, Coach Don and team focus on clean striking techniques that work for beginners and high level athletes. We have successfully worked with UFC, Bellator, and other top promotions.


Ronin Health and Fitness offers classes that will meet your schedule and pace! We use a mixture of kettlebells, battle ropes, and other equipment to make unique circuits that will get you results. Lose weight, get healthy, and have fun doing it. Give us a call today to try your first class for free.


A sport of unarmed combat derived from jujitsu and intended to train the body and mind. It involves using holds and leverage to unbalance the opponent.

  • "NJ Ronin is place that made me feel welcomed immediately."

    The instructors are amazing and are always encouraging everyone to ask questions. Definitely a place I can go to so that I can relieve any stress I had from the day. If you are hesitant about starting something new, whether it is Jiu Jitsu, striking, wrestling, or judo, definitely come in to watch. Danny is awesome and will let you try out what you want to learn so you can have a feel for it. I’ve been there for almost 6 months and I wish I did it way earlier!!!

    Andrew Papa
  • An excellent place with outstanding people and fantastic instruction"

    NJ Ronin is an excellent place to not only learn martial arts but be apart of something greater than yourself. Everyone at NJ Ronin is very friendly, has no ego and is more than willing to help out as much as learn and grow themselves. If you're on the fence about where to train or even get a good workout just stop in and get a feel for yourself. It is an excellent place with outstanding people and fantastic instruction. I would recommend to anyone at any age looking to better themselves.

    Hayden Lechner
  • Getting back into BJJ after being out for over a decade, could have been a stressful experience... but I am extremely lucky to have found a martial arts academy that was so welcoming and accommodating as NJ Ronin is. Danny's facility and members made me feel at home after just a few classes. Everyone is dedicated to improving one's self on and off the mats. The facility itself is clean, very spacious, and allows for recovery (saunas), as well as a gym area with a plethora of equipment. If you are on the fence about joining, take the leap of faith and walk on the mats...you'll thank yourself and be hooked

    Mike Madonna
  • This place has grown immensely since it started. From upgrading the fitness section with some of the best lifting and training gear around, to the recovery room complete with two different kind of saunas and a massage chair, the place is legit. Highly recommend stopping by and checking it out.

    Jerome Nelson
  • I’ve been training at NJ Ronin for a few months and I wish I had started sooner. The building is split into two parts, a nice open mat space for sparring, grappling, drills, classes, etc. The other half is a spacious and fully stocked gym with all of the equipment that you could ever need. There’s also a very nice sauna room to aid with recovery. They offer a great variety of classes and there is plenty of open mat time as well. Most importantly, the people here are great and I’m glad that I get to train with them regularly. Everyone here is humble and shows up ready to learn and better themselves. Last but not least, the owner is a super nice guy and has built something truly worthwhile here. Come in and train with us!

    Mony Houser
  • My 5 yr old and 7 yr old have been attending classes at NJ Ronin for a year and a half! They LOVE it! They have learned so much and I am really impressed! Coach Danny is amazing with the kids! Highly recommend!

    Suzy Michaels
  • After taking my first class I was hooked! Not only has NJ Ronin helped me get back into shape but it’s helped build my confidence. I’ve never done any form of martial arts prior to this but Danny made me feel welcomed and supported.

    Jaime Spokony
  • This has been a fantastic experience for all 3 of my kids. My boys were all new to the sport this past year. Coach Danny and his team have done an incredible job onboarding them into a new discipline while fostering a new sense of accomplishment and self-confidence in each of them. NJ Ronin feels more like a community...a family ...than just a dojo. Side benefit, the kids come out dripping in sweat 3 days a week! I cannot more highly recommend NJ Ronin. Incredible value for the $$

    Jason Forest
  • NJ Ronin had an incredible atmosphere! Great coaching and great training partners! A must if you live in the area, can’t recommend them enough!

    Colleen Quinn


  • Aidan Phillips
    Aidan Phillips Coach

    Aidan is a no gi specialist who trains under the 10th Planet system. Aidan brings unique perspectives and submissions to the Ronin family every Wednesday night.

  • Dan Jantzen
    Dan Jantzen Coach

    Dan brings his passion for Jiu Jitsu Fundamentals every Monday. He is a student under Renzo Gracie Black Belt, Jamie Cruz (Cruz Control BJJ) and has been instructing children in Martial Arts since 2012. He is also the competition coach and has been actively competing in grappling competitions since 2011.

  • Don Cioffi
    Don Cioffi Coach

    Former professional and amateur boxer, former Golden Gloves, Diamond Gloves and Interstate Champion. Coach Don is the owner of American Strikers and is focused on developing well rounded strikers. He has been very successful helping many professional boxers, amateur boxers and MMA fighters achieve their goals.

  • Matt Nicolls
    Matt Nicolls Coach

    Matt is an active fighter with a passion for teaching. He has experience coaching Jiu Jitsu, Fitness, and Striking classes. He is always striving to increase his knowledge in the field and truly enjoys helping others achieve their goals.

  • Jamie Cruz
    Jamie Cruz Professor

    Jamie Cruz is a 3rd Degree Brazilian Jiu Jitsu black belt under Renzo Gracie, and is regarded as one of the top grappling instructors in the state of New Jersey – US, where he has trained some of the best jiu jitsu and mixed martial arts (MMA) competitors in the region. Jamie brings his high pressure system to the Ronins every Thursday at 7pm.

  • Eric Roncoroni
    Eric Roncoroni Coach

    Eric has been training since 2009. He mainly focused on BJJ from the start and then quickly transitioned into becoming an MMA striker. He’s fought for some of the best east coast regional MMA promotions such as Cage fury fighting championship, Ring of combat, Art of War and many others. He won his first Belt as an ameatur but then went on to become the Ring of Combat Champion at middleweight!

  • Kelly Ryan
    Kelly Ryan Judo

    Kelly is a knowledgeable Brown Belt in Judo and an active competitor. She shares her knowledge with us every Thursday and has been teaching at NJ Ronin since 2018

  • Ryan Gellner
    Ryan Gellner Jiu Jitsu

    Ryan is an active Jiu Jitsu competitor and coach. He leads Takedown Tuesdays and also assists with kids classes.




follow us on

Contact Us

where we are

show on map


Contact Us

We're not around right now. But you can send us an email and we'll get back to you, asap.