Our Story

More Than A Martial Arts School We're A Community

We empower families in our community to live happier and healthier lives through martial arts.

OUR STORY

Changing Lives In Union

Duncan Martial Arts has served the Union Township community since 2012, carrying forward a legacy built by the late Professor Ronald Duncan Sr. — widely recognized as the "Father of American Ninjutsu" and a pioneer of martial arts in America for over 50 years. Now led by his son, Hanshi Gregory Duncan, the school continues to teach The Way of the Winds™ System, a comprehensive approach to self-defense rooted in Jujutsu, Taijutsu, Ninjutsu, and kickboxing. Two generations of family commitment and dedication make Duncan Martial Arts more than a dojo — it's a home for students of all ages looking to build confidence, discipline, and real-world skills

OUR STORY

Our Core Values

Safety First

Every class is taught in a fully padded, supervised environment by certified, background-checked instructors. Your child's safety is never negotiated.

Genuine Care

We know every child by name. Our instructors invest in each student's personal growth — not just their technique. This is a family, not just a gym.

Community

Duncan Martial Arts is a place where kids make lifelong friendships and parents feel at home. We celebrate every milestone together.

Excellence

We hold ourselves to the highest standards — in instruction quality, student development, and the culture we build inside these walls.

TEAM

Meet Your Instructors

Founder Of Duncan Martial Arts

Hanshi Gregory Duncan

Hanshi Gregory Duncan is a globally recognized martial artist and the son of the late Professor Ronald Duncan Sr., founder of The Way of the Winds™ System and the "Father of American Ninjutsu." Gregory carries forward his father's legacy with world-class instruction rooted in Jujutsu, Taijutsu, Ninjutsu, and kickboxing. With a team of skilled Black Belt instructors, Hanshi Duncan has built a family-friendly dojo in Union, NJ that emphasizes real-world self-defense, character development, and personal growth for students of all ages and experience levels.

Come Visit Us

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(908) 349-8619

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627 Chestnut St, Union New Jersey 07083

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