Our Team
Top Skills
Skilled Coaches
Our Black Belt coaches have decades of combined experience under their belts. You are in good hands at Tri-Valley Judo & Jiu-Jitsu
Our Judo Black Belts
Kevin Butler
Sensei Kevin
Head Coach / Program Director
Rank: Godan – 5th Degree Black Belt Judo 1st Degree IBJJF Certified BJJ Black Belt
Sensei Kevin began judo at age 5 under his father Bill Butler.
Promoted to black belt by Willy Cahill and coached by Steve Siroy. An International Gold Coach for USA Judo for over 15 years he has lead US Teams as head coach or assistant coach in 15 Countries. Coach Kevin has coached two athletes at the Jr/Cadet World Championships and 5 athletes at the Pan American Championships Infantile/cadet.
JUDO ACHIEVEMENTS
2023 PAN AMERICAN CHAMPION M6, -81K Mexico. 2022 VET WORLD CHAMPIONSHIPS, POLAND 7TH. RANKED #1 in the USA, M6 -81k. NATIONAL REFEREE
BJJ ACHIEVEMENTS
2023 ASIAN CHAMPIONSHIPS NAGOYA, JAPAN 2nd 2020 BJJ Masters World Champion at the black belt level.
PROFESSION Fire Battalion Chief (Retired) 32 years of service.
Slav Dugenny
Year started: 1994 under Mits Kimura at San Francisco Judo Institute. Moved to train under Willy Cahill in 2000.
Rank: Nidan
Things I like about Judo: Judo makes me feel alive, and coaching gives me purpose.
Coach level: USA Judo – Continental
Profession: Biological Scientist
Tracy Butler-Holt
Year started : 1966 I began judo at the age of 6 under the direction of my Father Sensei Bill Butler.
Rank : Nidan
Judo allows me to help others develop mind, body, and spirit in equal proportions while teaching public morality, increasing physical strength and stamina. Watching the students as they advance and overcome their limitations brings me great joy. After all, their success is my success. Judo is in my blood.
Coach Level: USA Judo – National
Profession: Health and Fitness Industry
Jared Nakashima
When you started: 1986
Rank: Nidan
Favorite things about judo: Olympic sport practiced worldwide in over 200 countries. Can be practiced by young and old, challenging the mind and body. Judoka learn life skills through the Kano moral code: courage, respect, modesty, sincerity, friendship, honour, politeness, and self-control.
Some others things about you: Father of three (2 boys, 1 girl),
Profession: Hospital Pharmacist
Coach level: USA Judo – National Level Coach
Vlad Kaminsky
Year started – 1983.
Rank – Nidan.
Favorite thing – A forever student and fan of judo who helps and motivates players of all levels to fall in love with the sport, improve their technical abilities, self confidence, and judo intelligence. Something about me: father of two kids.
Profession – Information Technology Leader.
Coaching Level – continental
Ernesto Eugenio
Judo Rank: Sandan
BJJ Rank: Purple Belt
In Judo, you will learn self confidence, focus, dedication, and leadership. All are valuable traits to develop throughout life.
While devoting my time as an athlete and coach, I’ve gained genuine friendships within the Judo community. Our goal at Tri Valley Judo is to teach young judokas lifelong lessons that they can implement in their future careers and life.
I have two daughters. Both of them are judokas. Practicing judo with my two daughters gave me a sense of fulfillment. It provided an opportunity to learn new skills. It remains the most inclusive sport for participants of all ages and varying abilities.
Profession: Real Estate Broker
Coach Level: Certified National Coach
Our Jiu-Jitsu Coaches
Kevin Butler
Head Coach/Program Director
Rank: 1st Degree Black Belt BJJ-5th Dan Judo. IBJJF CERTIFIED
Enjoys combing his experience as a wrestler, and judoka to BJJ and teaches BJJ from an International Judo Coach perspective where he applies strategy and tactics to his teaching style. He holds nothing back and shares his many years of martial arts training with all of his students.
Coach Level:
USA Judo, International Gold
Profession: Fire Battalion Chief (Retired) 32+ years of service
Accolades: 2023 ASIAN CHAMPIONSHIPS SILVER MEDALIST NAGOYA, JAPAN
2020 Masters Black Belt World Champion
Tony Alfonzo
Tony has been training and teaching martial arts for over 20 years. Tony holds a Brown belt in Brazilian Jiu Jitsu and a Black belt in Krav Maga.
Tony is a certified defensive tactics instructor and has taught at the police academy. Tony has a passion for fitness and believes in conditioning as a self defense tool. Tony is level 2 CrossFit coach and currently teaches at a local CrossFit affiliate.
Judo Class Times
Tuesday & Thursday
5:00-6:00PM | Ages 7-9 Beginner
5:00-6:30PM | Ages 7-12 Advanced
6:30-8:00PM | Teen & Adult All Levels
SAT
10:30AM-12:00PM | All ages
Jiu-Jitsu Class Times
Our Address
1040 Serpentine Lane #203 Pleasanton, CA 94566