
Our Classes · Medfield, MA
Every class is built for the age in the room, and every one carries the same rule Sensei Perez has taught for 50 years: learn to avoid the fight, not pick one.

Ages 3–4
A preschool class built by child-development experts, not a watered-down karate class.
Little Ninjas is built around four development blocks — physical, emotional, cognitive and social. Threes and fours learn to listen the first time, take turns, move with control, and do things for themselves. The structure is real; it just looks like play from the parent bench.
See Little Ninjas
Ages 6–12
Focus that follows them into the classroom and confidence that shows up at the bus stop.
Age-specific classes for 6 to 12 year olds that build concentration, self-control and resilience alongside real martial arts skill. Kids learn how to stand up for themselves and how to walk away — because the goal is a child who never has to fight.
See Kids Martial Arts
Ages 13+
A room where saying no is normal and effort is the only status symbol.
Teens train hard, get strong, and practice the thing that actually matters at 14 — holding their ground. Peer pressure, decision-making, integrity and self-respect are coached directly, not hinted at, inside a fitness program teens genuinely look forward to.
See Teens Martial Arts
Ages 17+
Tae Kwon Do, Krav Maga and Muay Thai. Practical self-defense, not kids' karate for grown-ups.
A blend of practical self-defense, Tae Kwon Do, Krav Maga and Muay Thai kickboxing for adults 17 and up. Beginner-friendly from day one, brutal on stress, and honest about what actually works. You will get stronger, more flexible and harder to rattle.
See Adults Martial Arts
Ages 5–12
Ninety minutes of games, board breaking and a cake cut with a samurai sword. You run nothing.
90 minutes, Ages 5–12. Digital invitations, martial arts games, board breaking, a custom theme, pizza, water and juice pouches, and a birthday cake cut with a samurai sword. Our staff runs the whole thing — including cleanup. $499 for up to 15 guests.
See Birthday Parties