About

A serious dojo, in the truest sense

Kanzen Karate School teaches Kanzen Gōjū-Ryū — traditional karate, in Marlboro, NJ. We are not a sport and we are not a daycare. We teach real karate, with the discipline and respect the art demands.

Our story

Kanzen Gōjū-Ryū was built by the late Master Harry Rosenstein, who taught from 1974 onward and upheld its standards for decades. The art he passed down traces back to the founders of Gōjū-Ryū.

Today his student, Shihan Donny Sheinwald, leads the school — preserving the same curriculum, the same protocol, and the same respect for the art. Some things are worth doing exactly as they were meant to be done.

A black belt being tied — tradition and discipline at Kanzen

What we stand for

Our values

Tradition

We teach classical Kanzen Gōjū-Ryū the way it was meant to be taught — kata, protocol, and etiquette intact.

Discipline

Students stand in stance, stay focused, and earn every step. Consistent effort, class after class, is how real progress is made.

Respect

Respect for the instructors, for training partners, and for oneself. It begins on the mat and carries into every part of life.

Self-Defense

Practical, traditional technique with full controlled sparring. Students learn to genuinely defend themselves — responsibly.

Confidence

Confidence here is built, not handed out. It comes from doing hard things well, again and again.

Focus

The clarity and inner drive students build at Kanzen show up in school, at work, and at home.

The instructors

Trained by masters

Shihan Donny Sheinwald

Ro Dan · 6th-Degree Black Belt · 42 years

Head instructor of Kanzen Karate School. A student of the late Master Harry Rosenstein, Shihan Sheinwald carries the tradition forward today. He completed a 100-man kumite — sparring one hundred opponents in a row — one of only two karateka recorded to have done so.

Shihan James Walsh

Ro Dan · 6th-Degree Black Belt · 42 years

Four decades on the mat. A senior instructor whose depth of experience anchors the dojo's standards and the quality of instruction every student receives.

Renshi Eddie Gullod

Yo Dan · 4th-Degree Black Belt · 35 years

Thirty-five years of training and teaching. Renshi Gullod brings patience and precision to students at every level, from first-day beginners to advanced ranks.

1974

Teaching since

5.0★

Across 22 Google reviews

100

Man kumite, on record

Come see for yourself

Watch a class, or step on the mat with a free trial lesson. Total beginners are always welcome.

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