Welcome to Dragons Den MMA

Union City's

Premier Martial Arts

And Fitness Club

  • Over 5,000 sq ft
  • 26' MMA Cage
  • 20' Boxing Ring
  • 40' Wrestling Mat
Kaju Logo

Dragon's Den
Train Hard Be Humble Fight Dirty

Union City’s Premier Martial Arts and Fitness Club comes from humble beginnings. Sigung Jeff Macalolooy founded the Dragons Den in his parent’s garage during his last year at CSU Hayward, in March 1997. Sigung Jeff began his personal journey in the martial arts in 1980, training in the St. Anne’s Church Hall in Old Alvarado.

A unique approach to the modern martial artists is complemented with the values of traditional martial arts.

Members of the Dragons Den are part of a Martial Arts Ohana (family). The evolution of training is fostered without sacrificing the respect, virtues, and roots of true martial art traditions.

Today, Dragons Den MMA has multiple martial arts and fitness programs for children, teens, men, and women. Classes range from combat sports to fitness classes and from traditional martial arts classes to professional fighter training.

Train Hard Be Humble Fight Dirty

  • “ I love working out at the Dragons Den. It has really helped me reach my fitness goal. The instructors are very friendly and supportive. I have been taking classes at the Dragons Den for about 6 months so far and I have lost almost 40lbs! I feel healthier and stronger! ”

    DC Girl-Faye Bennett
  • “ To all my Kaju Ohana, I’ve have been practicing grab punches this week getting ready for my Blue Belt test and found out today that grab punch art # 6 works. I'm at work right now and earlier today at around 5pm an outsider what we call a 1030 came into the building and tried to pick a fight with our janitor. I stepped in between the both and the outsider grabbed me and tried to punch me and out of reaction came out grab punch # 6 with out the finish. ”

    Abraham DeVos
  • “ We love Dragons Den! My 5 year old daughter is in the Tiny Dragons kajukenbo class and I take the twice-weekly Lady Dragons kickboxing class. The teachers are fantastic, incorporating lessons that target the different skill levels of participants and guiding our development patiently and with genuine friendliness (so it's not about being strict cold instructors). Plus, there's a family waiting room area for parents and siblings to hang out in while waiting. I recommend it wholeheartedly! ”

    Anna Wang
  • “ I have 10+ years of experience training in the martial arts, so I was highly selective when I started looking at schools for my children. Several of my patients recommended Dragon's Den to me, and I was struck by how they were all so humble, respectful, and grounded. Both of my daughters and my wife have been training here for several years. All of the instructors do a wonderful job of promoting a healthy, family-oriented atmosphere that is mutually supportive and brings out the best in each student. When my oldest daughter first started, she was very shy and tentative. She even faked a stomach illness once to get out of a ballet practice. After training at Dragon's Den, I've seen a tremendous change in her self-confidence and how she carries herself. The first time she volunteered to demonstrate a form solo in front of the class, I could hardly believe it. Now, she practices by herself before school without being asked because she wants to compete in tournaments. It's a family business in the truest sense of the word. They make their students feel accepted and safe as part of the Dragon's Den ohana.(family) The self-defense training is top notch, but they're not just teaching their students to be great martial artists; they're helping them to realize their potential as better people”

    Scott Chong

Our Teachings
What we Offer

DDMMA currently offers traditional martial arts classes in Hawaiian Kajukenbo, Indonesian Silat, and Filipino Eskrima. More modern, competition-based arts include Muay Thai Boxing, No-Gi Jiu-Jitsu (Baret Submissions), and Mixed Martial Arts (cage-fighting). There are also the sanctioned Olympic sports of USA Boxing and USA Wrestling.

Fitness classes for men & women are available mornings, mid-day, and evenings in Fusion Fitness, which incorporates resistance training, plyometics, agility, kettlebells, suspension systems, and circuit training. We also offer a women's only fitness kickboxing class, Lady Dragons.

All the classes are infused with Jeet Kune Do, based on the philosophies of the great Bruce Lee and Grandmaster Richard Bustillo's International Martial Arts and Boxing (IMB) curriculum.