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Z-Ultimate Self Defense Studios

5 ★★★★★ 20 Google reviews · Karate dojo in Tustin, California

Affiliated Kids & teens Private lessons

Affiliated dojo — reviews and the dojo's own info point to a recognized Karate style organization or franchise (think Shotokan/JKA, Kyokushin, Goju-Ryu, Isshinryu, Tiger Schulmann's or Villari's). If lineage matters to you, ask which style and organization the dojo belongs to, and under whom the head sensei earned their black belt.

Plan your first class

  • Kids & youth classes kids and youth Karate classes — built around discipline, focus, and confidence
  • Private lessons private, one-on-one instruction available — a focused way to start or to work around a busy schedule; ask about availability and rates
  • Adult classes adult Karate classes — training built for grown-ups, from fitness and fundamentals to kumite (sparring) at your own pace
  • Today see hours ·
  • Website & schedule martialartstustin.com — book classes and see the live schedule
  • Phone +1 714-730-6452

Hours

Monday 12–9 pm
Tuesday 12–9 pm
Wednesday 12–9 pm
Thursday 12 am–9 pm
Friday 3–8 pm
Saturday 8 am–3 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 Z-Ultimate Self Defense Studios, confirmed in students' own reviews and the dojo's own info — not guessed from the sign out front.

🧒 Kids Karate 13 mentions

“A huge plus for parents: kids are brought up to speed with private one-on-one lessons before joining the group class, so they feel confident, prepared, and never overwhelmed.”

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Teens 2 mentions

“He was a great instructor for young kids, teens and adults.”

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👤 Private Lessons 4 mentions

“A huge plus for parents: kids are brought up to speed with private one-on-one lessons before joining the group class, so they feel confident, prepared, and never overwhelmed.”

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🛡️ Self-Defense 9 mentions

“He was always upbeat, energetic patient and knew exactly when to push me safely to fully improve my self defense and life skills.”

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Other martial arts here

Karate dojos are usually multi-discipline. Here's what else students mention training under the same roof at Z-Ultimate Self Defense Studios — mined from their reviews and the dojo's own info.

🐉 Kung Fu 2 mentions

“They have learned so much from Sensai Diaz both in Kung Fu and life values and how to respect everyone.”

Other dojos that also teach kung fu →

🛡️ Self-Defense 9 mentions

“He was always upbeat, energetic patient and knew exactly when to push me safely to fully improve my self defense and life skills.”

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 20 Google reviews — in their own words.

expert instruction from a great sensei 9 mentions

“Master Diaz is a kind and patient teacher (and of course tough when needed).”

friendly, respectful dojo 4 mentions

“What makes this place special is the emphasis on respect, kindness, honor, and personal responsibility all taught in a fun, supportive environment.”

strong technique, kata & fundamentals 3 mentions

“Master Diaz was diligent in insuring not only proper form, but also explaining the practical application of the various defensive techniques.”

builds confidence, discipline & respect 8 mentions

“They teach real, practical self-defense techniques that help stop an attacker while building confidence, awareness, and self-control.”

From the reviews

In 2000, when my 7 years old daughter expressed interest in the martial arts, we went and looked at about 10 different studios offering different styles in Tustin, Irvine and Santa Ana. She tried out a few places and for one reason or another she did not like many.

★★★★★ — Mary, Dec 2013

One of the most enriching experiences of my life has been my time with Sensei Diaz. I have studied with him for the better part of two decades and the experience had enriched me in ways I never could have imagined.

★★★★★ — Jon, Apr 2014

The thing that I like best about Z Ultimate Self Defense is the focus on the students. Everyone, from the top of the organization on down, is committed to success in studying the martial arts.

★★★★★ — Stephen, Dec 2013

I live in Tustin and came across this Martial Arts studio called Z Ultimate. Apparently, they are a franchise with multiple locations in other cities. The guy I met was Chris and seemed very knowledgeable about Self Defense, Karate and Martial Arts.

★★★★★ — T., Mar 2014

Excerpts from public Google reviews. Read all 20 reviews →

Your first Karate class at Z-Ultimate Self Defense Studios

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 Z-Ultimate Self Defense Studios

13112 Newport Ave Suite C, Tustin, CA92780

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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.