Contact Us National Karate - Academy of Martial Arts


Central Park Square
1422 Mainstreet
Hopkins, MN 55343
United States
School Owner: Mr. Jeff Sidner, 6th Degree Black Belt
School Manager/Head Instructor: Mr. Barry Maxwell, 3rd Degree Black Belt
Instructors: Mr. Tim Fruth, 3rd Degree Black Belt
Mr. Justin Wilson, 2nd Degree Black Belt
Mr. Matt Larson, 1st Degree Black Belt
Office Manager: Ms. Tammy Goodwater.
About Hopkins National Karate

Since 1973, the National Karate Academy has been dedicated to helping men, women and children discover the benefits of martial arts training.

Physical strength, flexibility and weight control are developed through high repetition natural body exercises.

Mental confidence is achieved from time-tested & effective self-defense skill.

NK training teaches respect, self-discipline and perseverance.

NK’s black belt professional instructors are highly trained and dedicated to help all students achieve their life goals.

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About Mr. Jeff Sidner

Jeff Sidner began his martial arts training in 1989. After trying several schools, he found the Maplewood National Karate School in 1992 and immediately knew he’d found his martial arts home. He was promoted to 1st Degree Black Belt in 1995 and currently holds the rank of 6th Degree Black Belt.


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We had a fantastic turnout at Saturday's Sparring Seminar with Mr. Lemon! Thanks for coming out and working with our students.

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We are now accepting pre-orders for The Hopkins Raspberry Festival t-shirts! Because nothing says Hopkins National Karate quite like a fighting raspberry on your t-shirt 😄

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It’s really important that our students understand what respect is, and demonstrate it in our school.

How can you show someone respect?

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Congratulations to our students who competed in the Central States Karate Championships tournament on Saturday! This family of warriors took first place in all of their events. Way to rock the tournament!

#karatelife #karatefamilies #karatetournament #tournament #champions #nationalkarate #mightforright #karate
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Birthdays at the karate school mean you need to wear the hat 🎉 Happy Birthday!

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*2 week trial is a one-time offer for new students only. Uniform purchase required.