603 Karate

603 Karate "Earn your advantage in life"

603 Karate focusses on helping people become the best version of them Thank you for your interest in 603 Karate!

My name is John Guarnieri and I am the owner and head instructor at 603 Karate. Martial arts has been a passion of mine for much of my life. 603 Karate offers traditional Uechi Ryu Karate classes for children (ages 8-12), teens, and adults. Through consistent and dedicated Karate training, you will become a better version of yourself, in mind, body and spirit. What may seem like an insurmountable

hurdle now could become an exciting challenge to conquer after experiencing strength gained through your training. Uechi Ryu Karate follows the theory of being “half hard, half soft.” Not everything is based on superior strength, but more on superior technique. Superior technique is achieved through mastery of highly effective basics. Uechi Ryu is an Okinawan style of Karate founded by Master Kanbun Uechi (1877-1948). Uechi Ryu has remained true to its roots and follows the same curriculum today as that of Kanbun Uechi and his son, Kanei Uechi in Okinawa. Uechi Ryu is a highly effective martial art based on practical and proven self defense techniques. Uechi Ryu is not a flashy martial art with spinning kicks and high flying movements, but is an in-close style based on a strong stance, core, and mindset. People start martial arts training for all types of reasons: learning self defense, getting in better shape, exercise in a social environment, gaining better focus and self confidence. All of these benefits will be gained through consistent training at 603 Karate. I am focused and dedicated on helping each new student achieve their goals, then set new challenges to gain consistent growth in life, much like I have experienced. I have been a proud serving member of New Hampshire law enforcement for 8 years and my training in Uechi Ryu Karate has given me the confidence to succeed in many dangerous and intimidating situations.

603 Karate is a welcoming and positive family environment. In addition to regular Karate training, kids and teen classes will involve weekly “Mat Chats” focusing on self empowering topics and methods to bring lessons learned inside the dojo and out into their daily lives. I have seen the effectiveness of this in my own family with my daughter who has been studying Uechi Ryu since 2012. I have witnessed her take lessons learned inside the dojo, such as self confidence and self awareness, to deal with problems she has encountered very effectively. I credit much of her maturity and ability to deal with adversity in her life to her karate training. Classes at 603 Karate are offered at several different times during the week to make it as convenient as possible for you. So whether you work days or nights, you are a student or a stay at home parent, you will be able to find a program and classes that works for your schedule. Training in Uechi Ryu has improved my life in many ways, too many to mention. See what training in a fun, friendly, safe, supportive, and positive environment can do for you. Please contact 603 Karate for more information or any questions you may have. Ask for John, I’d be happy to help you! See you on the training floor!

If you act like a goof in class, it will be documented... 🤪 📷
06/14/2026

If you act like a goof in class, it will be documented... 🤪 📷

Just a couple of shiny headed dudes doing Karate. No big deal...👨‍🦲🥋
06/13/2026

Just a couple of shiny headed dudes doing Karate. No big deal...
👨‍🦲🥋

🧪The experiment was a success!I received a message months ago requesting I bring my Tai Chi classes back. ☯️  I taught t...
06/12/2026

🧪The experiment was a success!

I received a message months ago requesting I bring my Tai Chi classes back. ☯️ I taught them briefly in early 2020 before Covid put an end to them. And I never brought them back.

But the request made me reconsider. I thought I'd see how it went for a short time. If people liked the classes, then I'd consider making them permanent again. 🧘

About 12 people participated in classes. Not only did they love taking the class, but I loved teaching it again! ☯️💙

So...starting in September 2026, 603 Tai Chi will be back at 603 Karate!

Full details are still being structured. These will be offered as morning classes. Days and times TBD.

But if you are interested in practicing in the meditative arts, let me know and I'll put you on the alert list.

Classes are geared towards beginners. Great for gaining mobility, joint health, a calm mind, and much more.

Until then...✌️

Want to up your uniform game with an embroidered Gi??I had 2 new Gi's embroidered in 3 spots: the 603 Karate logo on the...
06/11/2026

Want to up your uniform game with an embroidered Gi??

I had 2 new Gi's embroidered in 3 spots: the 603 Karate logo on the sleeve, the IUKF logo on the chest (since 603 Karate is now a member of the association😁), and the Uechi Kanji on the nape.

My friends at Evergreen Embroidery in Campton did an amazing job 🧵👏
If you ever have any personal or professional embroidery needs, I can't recommend them enough.

You can get yours done too! This would be perfect if you are:
- Testing for Black Belt
- Competing in tournaments
- Or, your serious about Karate and want to look better than everyone else 😉

You can have this done on a new or existing Gi.

PLUS, I'd really appreciate it. You see, I have the hots for the shipping/receiving lady at Evergreen Embroidery. Your order would help me score some points!

I'll send an email today with ordering details if you're interested. -john g

Working the Cardio Kickboxing circuit. 🌞 or 🌛 classes. Think you have what it takes? 🥊
06/10/2026

Working the Cardio Kickboxing circuit.
🌞 or 🌛 classes.
Think you have what it takes? 🥊

Stripe promotion!Great job buddy 👏
06/09/2026

Stripe promotion!
Great job buddy 👏

06/08/2026

We have fun 1x/year in the Teen/Adult classes.

This year it was training to keep your focus under chaos.

Hope you enjoyed it. See you next year 👋

First stripe pride 👏👏What a great student! 💛
06/05/2026

First stripe pride 👏👏
What a great student! 💛

I'm very happy and proud to announce that 603 Karate is now part of the International Uechi-Ryu Karate Federation (IUKF)...
06/03/2026

I'm very happy and proud to announce that 603 Karate is now part of the International Uechi-Ryu Karate Federation (IUKF).

The IUKF was founded by Grandmaster Mattson (left in picture). The President is Sensei Testa (right in picture).

I have been studying under these two gentlemen for 2 years now. My Karate has grown tremendously in that time. So, it was a natural next step to have the dojo join under their leadership.

The IUKF is an extremely respected organization with dojos in the US, Canada, South America, and Europe (I may even be missing some places here).

Each martial arts organization has its own priorities. What I like about the IUKF, besides expert leadership, is the focus is on growth of the instructor and students above all else.

The only downside to this is... you're still stuck with me day to day. Nothing will change there. 😉

It's truly an honor to make this official as our humble little dojo continues to grow.
-john g

Awesome Cobra Kai shirt! 🐍 👊
06/02/2026

Awesome Cobra Kai shirt! 🐍 👊

Address

61 Summer Street
Northfield, NH
03276

Opening Hours

Monday 5pm - 8pm
Tuesday 5pm - 8pm
Wednesday 5pm - 8pm
Thursday 5pm - 8pm

Telephone

+16037266335

Alerts

Be the first to know and let us send you an email when 603 Karate posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to 603 Karate:

Share