Home: Notice: Monterey County has closed public schools due to the COVID-19 pandemic. Seibukan Jujutsu of Salinas & UMASDA will be closed until 4/1. To be updated as information becomes available.

Welcome to Seibukan Jujutsu of Salinas!

Please look around and feel free to contact us for more information!


Dojo-Cho, Seibukan Jujutsu of Salinas

Marcus Thornton
Menkyo Kaiden Shihan, 7th Degree Black Belt

Seibukan Jujutsu of Salinas

Hello, I’m Marcus Thornton and I am the Dojo-Cho (Head Instructor) of Seibukan Jujutsu of Salinas. I started my training in Seibukan Jujutsu in 2006 under the Founder of the Art, Julio Toribio Kancho. Through years of hard work and dedication, I earned my Certified Instructor credential in 2017 and my Nanadan (7th Degree Black Belt) in 2018. I have lived in the Monterey area for almost forty years and plan on living here for the rest of my life. I have a beautiful wife of thirteen years and a seven year old son who currently trains with me in our Little Dragons class.

My goal as an instructor is to empower my students to create who they want to be in life as well as on the dojo mats and learn the skills they need to move through life in a positive manner.

I have been employed professionally for the last nineteen years+ working as a Preschool/PreToddler teacher for the US Navy locally in Monterey, CA. The majority of my adult life has been spent working with children, and I currently hold several credentials in early childhood care and development. My experience as a Preschool teacher has helped me to be able to connect with people and help them grow whether in a group setting or via private lessons/personal interaction. Through leveraging the skills I continue to develop, my approach to teaching has helped me and continues to help me empower and connect with all of my students.

I maintain current CPR certification in addition to my educational and martial arts credentials and seek to provide a safe and fun environment to share the wonderful art of Seibukan Jujutsu with all of our students. I look forward to meeting you and I’ll see you on the mats!


Seibukan Jujutsu of Salinas is located at the UMASDA, Inc. dojo at 339 Maple St, Unit C, Salinas CA 93901.

As you enter the facility you proceed through the hallway where the school has diplomas for Black Belts hanging.

Through the hallway is the restroom, water dispenser, and foyer with refrigerator, microwave, and storage for weapons and training gear.

Two changing rooms with automatic lights.
The Shomen

This is the view opposite the changing rooms, the “firmer” mat area.

From the rear of the 500sq foot mats.

The rear “softer” mat area.


Seibukan Jujutsu of Salinas offers three programs that cater to different age range students, all taught by our Dojo-Cho (Head Instructor) Marcus Thornton, Shihan. All coursework for the Seibukan Jujutsu member schools are certified and approved by Julio Toribio, Kancho; founder and Head of the International Seibukan Jujutsu Association (ISJA).

Adult Program (12+) Fridays 7PM & Sundays 12PM
The adult program in Seibukan Jujutsu is geared higher than the Youth or Young Dragons programs, and the minimum age accordingly is 12. The adult program is the full Seibukan Jujutsu curriculum as part of the ISJA. Our curriculum includes empty hand and weapon based self defense as well as drills and exercises designed to develop skill sets for recognizing and responding to various strikes, grabs, locks/holds, and multiple attackers. Students will be introduced to a range of traditional and non traditional weapons as part of our curriculum. We stress application of techniques progressing from initial learning phase of slow, correct, deliberate actions and increasing the speed and intensity up to as close to street speed as possible once the student develops the requisite skill level. Learning to protect yourself through developing skills to safely fall and roll helps in daily life should you lose your footing – imagine walking down the sidewalk and accidentally tripping over uneven pavement, but being able to simply use the momentum and roll out of the situation instead of impacting the cement!

Youth Program (8-12) Sundays 2PM
The youth program is for older children that can handle material delivered at a more advanced pace than the Young Dragons program, for youths 8-12 years old. The curriculum is based on the Adult coursework, with less material per level of study and an age appropriate level breakdown to encourage the student to learn and progress at a pace that rewards their effort and balances the workload with what they are already learning in school and at home. We focus heavily on helping our youths to learn communication skills and take accountability for their own decisions and behaviors.

Young Dragons (5-7) Sundays 3:15PM
The Young Dragons are Seibukan Jujutsu black belts of the future. The Young Dragons focus on building positive interaction skills with classmates, listening skills and demonstrating behavioral development to help them become great students in life as well as on the mats. The Young Dragons curriculum is restructured from the Adult curriculum into several further levels with less material to help the students grasp concepts and principles while rewarding them for their achievements with additional levels exclusive and age appropriate for their learning process. We empower our students with a strong grasp of what is appropriate use of their Art in self defense, and the importance of understanding when is the right time to use their skills.