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National Karate & Martial Arts Naperville

5 ★★★★★ 197 Google reviews · Karate dojo in Naperville, Illinois

Karate dojo Free trial Beginners welcome Kids & teens Competition team

Plan your first class

  • Free trial / intro class most dojos welcome new students with a free trial or intro class — check their site or give them a call to book your first session
  • Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
  • Kids & youth classes kids and youth Karate classes — built around discipline, focus, and confidence
  • Adult classes adult Karate classes — training built for grown-ups, from fitness and fundamentals to kumite (sparring) at your own pace
  • Competition team a competition team for students who want to test themselves at kumite tournaments
  • Today see hours ·
  • Website & schedule chicagonk.com — book classes and see the live schedule
  • Phone +1 630-581-1500

Hours

Monday 4–9 pm
Tuesday 4–9 pm
Wednesday 4–9 pm
Thursday 4–9 pm
Friday 4–9 pm
Saturday 8:30 am–1 pm
Sunday Closed

Hours shift for holidays, belt tests, and seminars — worth a quick check before a special trip.

The classes they run

Karate classes on the schedule at National Karate & Martial Arts Naperville, confirmed in students' own reviews and the dojo's own info — not guessed from the sign out front.

🧒 Kids Karate 29 mentions

“Sensei Mazzola really knows how to interact and teach the kids ok their level to make sure they genuinely learn each move along with learning together amongst their piers.”

All dojos that run kids karate →

🛡️ Self-Defense 2 mentions

“The classes are engaging and focus strongly on practical self-defense while maintaining the right level of discipline.”

All dojos that run self-defense →

🌱 Beginners

“My three kids trialed a beginner class at National Karate for 3 sessions and loved it!”

All dojos that run beginners →

Other martial arts here

Karate dojos are usually multi-discipline. Here's what else students mention training under the same roof at National Karate & Martial Arts Naperville — mined from their reviews and the dojo's own info.

🛡️ Self-Defense 2 mentions

“The classes are engaging and focus strongly on practical self-defense while maintaining the right level of discipline.”

Other dojos that also teach self-defense →

Disciplines are mined from reviews and the dojo's own info — they show what students have trained, not a formal class guarantee. If you specifically want taekwondo, jiu-jitsu, or kickboxing alongside your Karate, confirm the current schedule with the dojo.

What students say

The things reviewers bring up again and again across 197 Google reviews — in their own words.

expert instruction from a great sensei 5 mentions

“Sensei John is a great teacher and the boys have really grown attached to Karate and have really shown growth and discipline.”

🌱 welcoming to beginners 4 mentions

“Mazolla and his team are fantastic with the kids, welcoming, attentive, and great at making sure everyone stays engaged and involved.”

friendly, respectful dojo 12 mentions

“We’re so grateful to be part of the National Karate family and highly recommend them to any family looking for an activity that builds character, leadership, and lifelong skills.”

🧒 strong kids program 4 mentions

“Great class my son loves it would definitely recommend it the senseis are great and work with the kids in areas they need help with also very affordable”

builds confidence, discipline & respect 23 mentions

“Since my daughter started training here, we’ve seen such an incredible transformation in her confidence, focus, discipline, and respect for others.”

From the reviews

5/5. I highly recommend this school for families, and adults. My father, Master Mazzola, and Master Nelson have been incredible sensei’s in my life. Not only do we have an opportunity to train at this school but National Karate has many schools to where students can learn and develop their skills with the other…

★★★★★ — Carson, Mar 2026

⭐⭐⭐⭐⭐ We couldn’t be happier with our experience at National Karate & Martial Arts Naperville! Since my daughter started training here, we’ve seen such an incredible transformation in her confidence, focus, discipline, and respect for others.

★★★★★ — Devon, Jun 2026

John Mazzola is amazing! When I contacted him about setting up a karate demonstration for students, he offered to lead 2 self-defense classes!!! John found ways for every student who wanted to participate, to do so on their own terms. He showed patience, kindness, and acceptance for all.

★★★★★ — Jeanine, Mar 2026

Hands down BEST Karate school in the Chicagoland area. My 3 boys love Sensei Mazzola and his classes. Sensei Mazzola really knows how to interact and teach the kids ok their level to make sure they genuinely learn each move along with learning together amongst their piers.

★★★★★ — Bryan, Sep 2025

Excerpts from public Google reviews. Read all 197 reviews →

New to Karate? Start at National Karate & Martial Arts Naperville

National Karate & Martial Arts Naperville comes up as a beginner-friendly dojo — noted on their own site. If you've never thrown a punch or set foot in a dojo, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit or flexible to start — you get in shape by training, not before it, and the sensei scales the intensity to you. Second, you won't be thrown into hard sparring — reputable dojos build fundamentals (stances, blocks, punches, and kicks) for weeks, and kumite (sparring) eases in gradually, with pads and control. Third, all levels and ages really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most dojos are happy to let you watch or try a class first, so reach out before you commit.

See their beginner class info

Your first Karate class at National Karate & Martial Arts Naperville

Nervous about walking into a Karate dojo for the first time? Almost everyone is, and a good sensei expects beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling basic stances, blocks, punches, and kicks — not hard sparring. Step to the side whenever you need to; no one will bat an eye. What to wear: athletic wear you can move in (or a gi if you have one); you'll train barefoot. What to bring: water, and a mouthguard if you have one — many dojos lend a loaner gi for a first class, so it's worth asking when you call. As you keep training you'll add your own gi and the belt your dojo awards you. Kumite (sparring) eases in gradually, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the sensei. It gets easier fast — most people feel far more at home by their third class.

Karate is a contact sport. Ease in, train within your limits, listen to your instructors, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find National Karate & Martial Arts Naperville

1795 S Washington St #102, Naperville, IL60565

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this dojo? Claim your listing — it's free.