Traditional Karate for Tilton, Northfield, Concord, Beyond

Our Traditional Uechi Ryu Karate Classes Offer Fitness, Self-Defense, and High-Energy Fun!

Our Traditional Uechi Ryu Karate Classes Offer Fitness, Self-Defense, and High-Energy Fun!

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See what people are saying about 603 Karate

Mike and Erin Grubb

August 12, 2019

We love 603 Karate! John is an excellent instructor- he makes class fun, but also makes sure the kids take their training seriously and have respect for the art. The price is great too! We would highly recommend 603 Karate!... Read More

Sarah Hoidahl

September 13, 2019

My son fell in love with karate in his first class. John is a wonderful instructor and is great with the kids. He takes the time to help each child individually, no matter what their skill level. He teaches and demonstrates hard work, integrity and self respect while also making sure the children are having fun. Not to mention he is informative and communicative in regards to any questions or conc... Read More

Amanda Carey Champagne

August 09, 2019

603 Karate has been amazing. Sensei John is great with my son, keeps him focused, serious but let’s him have fun and has increased his confidence ten fold. His classes are an excellent balance of learning, fitness, endurance and skill. So very happy and highly recommend 603 Karate!!... Read More

Thomas McGrevey

June 13, 2019

Some the best interactive, engaging instruction I’ve encountered! Highly recommend. John is fun, engaging, professional and brings out the best in students. We've met great new friends among students, too! Join him for a sample lesson and see what we mean!... Read More

Kids Martial Arts Belmont

Shelly Ralston

September 06, 2019

603 Karate is a great place for kids, adults, and families to train in martial arts. I find that the classes are challenging but fun. My kids are learning discipline, respect, and karate while having fun and making friends. There’s also an opportunity to participate in self-defense and bully proofing classes. I highly recommend 603 Karate!... Read More

Renee Mariann

June 13, 2019

John is a phenomenal instructor. My son has not only learned the art of karate but has learned how to deal with his emotions on a much better level. He has learned how to better control his environment. My son gets excited when he knows it’s time to his Karate class. He also has taken the time with his students to teach them different ways on how to deal with bullying by taking different app... Read More

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More Than Just Physical Fitness

Uechi Ryu Karate Sets Students Up For Lasting Success

Kids Martial Arts near Northfield

Confidence & Self-Esteem

Traditional karate training instills a powerful sense of a self-confidence. You'll feel better about your body, sharpen your mind, and strengthen your spirit. Join us and discover that the martial arts offer so much more than physical fitness... they offer a wealth of mental health benefits too!

Kids Martial Arts near Northfield

Discipline & Self-Control

As you progress through the various kata that we teach in our Uechi Ryu Karate system, you'll learn discipline and focus. More complex techniques require conscious self-control. As you train, you'll discover how this mental fortitude translates over into professional and scholastic success.

Kids Martial Arts near Northfield


After nine years of experience working in law enforcement, Head Instructor John Guarnieri has a real-world understanding of self-defense. That's why 603 Karate teaches a system which has strong roots in tradition and real value in a dangerous situation. Learn how to protect yourself, your loved ones, and stay safe in any situation.

Kids Martial Arts near Northfield

New Friends & Mentors

Uechi Ryu Karate has a rich history of strong foundational values, creating personal growth, and respecting the teachings of wise mentors. When you train at 603 Karate, you'll meet other like-minded members of our community, be challenged, train under an experienced instructor, and have the opportunity to create positive life change.

Why Choose Karate? Why Choose Us?

We're on a mission to provide the best traditional karate training for everyone from Tilton-Northfield to Concord. Our kids karate classes aim to improve self-esteem and build confidence, create discipline, and teach respect. Our teen and adult karate classes offer practical self-defense training, a fun and exciting path to fitness, plus enhanced focus in everyday life!

Join our community here in Tilton-Northfield and learn how you can gain confidence, cultivate self-discipline, and lead a healthier, happier life through the tenets of traditional Uechi Ryu Karate training!

At 603 Karate, we're giving our members the chance to use traditional martial arts training as a path to advance their lives, careers, and happiness. We provide a positive, supportive training environment with stellar karate instruction. John Guarnieri, the owner and head instructor at 603 Karate, served in New Hampshire Law Enforcement for nine years, and during that time garnered the professionalism, real-world experience, and self-defense knowledge to be able to teach traditional karate with a modern perspective.

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