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Judo Kai of Fairfield

5 ★★★★★ 15 Google reviews · Muay thai gym in Fairfield, New Jersey

Free trial Beginners welcome Kids & teens Fitness classes Fight team

Plan your first class

  • Free trial or intro class most gyms welcome new members 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 muay thai classes — built around discipline, focus, and confidence
  • Fitness & conditioning muay thai fitness and cardio classes — a serious workout you can do without ever having to spar
  • Fight team a competition team for members who want to test themselves as amateur fighters
  • Today see hours ·
  • Website & schedule judokainj.com — book classes and see the live schedule
  • Phone (908) 723-0570

Hours

Monday 5–8 PM
Tuesday 6–8 PM
Wednesday 5–8 PM
Thursday 6–9 PM
Friday Closed
Saturday 12–1 PM
Sunday Closed

Hours shift for holidays, seminars, and open-gym times — worth a quick check before a special trip.

The classes they run

Muay thai classes on the schedule at Judo Kai of Fairfield, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🌱 Beginner Muay Thai 3 mentions

“Decades of experience teaching Judo for all ages at all levels.”

All gyms that run beginner muay thai →

🏆 Fight Team

“So if you’re just looking for a good workout, learning self defense or compete - this place is for you.”

All gyms that run fight team →

🛡️ Self-Defense 2 mentions

“So if you’re just looking for a good workout, learning self defense or compete - this place is for you.”

All gyms that run self-defense →

Other martial arts here

Muay thai gyms are usually multi-discipline. Here's what else members mention training under the same roof at Judo Kai of Fairfield — mined from their reviews and the gym's own info.

🥋 Brazilian Jiu-Jitsu (BJJ) 2 mentions

“Coming from a bjj background, I thought my standup was pretty good until I ended up on my back dozens of times.”

Other gyms that also teach brazilian jiu-jitsu (bjj) →

🤼 Judo 8 mentions

“I truly appreciate that heknows how to teach people of all ages and experience as that has allowed my wife and I to both train here and grow in the great sport of Judo.”

Other gyms that also teach judo →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want BJJ, boxing, or MMA alongside muay thai, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 15 Google reviews — in their own words.

🧑‍🏫 expert, authentic coaching 3 mentions

“The coaches are knowledgeable and the judokas are some of the best people I have the pleasure of knowing.”

🌱 welcoming to beginners 4 mentions

“A welcoming atmosphere from dedicated folks who take Judo seriously.”

From the reviews

Definitely the place to be if you have experience in Judo or interested in trying it out. It’s really big on safety and creating an atmosphere where you can move and learn at your own pace. No reason to be super fit or strong to come to this dojo. People of all shapes and sizes are welcomed.

★★★★★ — Danny, Feb 2022

My family has been training at judokai of Fairfield for three years. The coaches are knowledgeable and the judokas are some of the best people I have the pleasure of knowing.

★★★★★ — Heather, Jun 2024

Sensei Kevin Costello is the best in the biz. Decades of experience teaching Judo for all ages at all levels. From a first day beginner to a seasoned competitor.

★★★★★ — Craig, Jan 2022

Training with Kevin has been one of the more rewarding experiences in my life. You really can’t replace the challenging atmosphere and great instruction. Simply put, if you want to play judo recreationally or competitively, come on in and give it a try.

★★★★★ — Andrew, Apr 2021

Excerpts from public Google reviews. Read all 15 reviews →

New to muay thai? Start at Judo Kai of Fairfield

Judo Kai of Fairfield comes up as a beginner-friendly gym — noted on their own site. If you've never thrown a punch or a kick, 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 to start — you get in shape by training, not before it, and coaches scale the conditioning to you. Second, you won't be thrown into sparring — reputable gyms build fundamentals (stance, footwork, and the basic strikes of the "art of eight limbs") for weeks before any contact, and sparring stays optional. Third, all levels 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 gyms are happy to let you watch or try a class first, so reach out before you commit.

See their beginner class info

Your first muay thai class at Judo Kai of Fairfield

Nervous about walking into a muay thai gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics on pads and bags — not fighting. Rest whenever you need to; no one will bat an eye. What to wear: shorts or athletic wear and a t-shirt; you'll train barefoot on the mats. What to bring: water and hand wraps if you have them — many gyms lend gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves, wraps, a mouthguard, and shin guards. Sparring is optional and comes later, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.

Muay thai is a contact sport. Ease in, listen to your coaches, 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 Judo Kai of Fairfield

1275 Bloomfield Ave Bldg 5 unit 26b, Fairfield, NJ07004

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