Jiu jitsu in Stockton, CA
Kids at 5pm. Adults at 5am. One black belt coach.
Coach K grew up in Stockton. He earned his black belt from a founder of the Ares BJJ team.
5.0 on Google from 7 reviews · Ares BJJ affiliate
No card needed.


Buffalo Black BJJ, an Ares BJJ affiliate
- 2017 Ares BJJ affiliate, on record since 2017
- Black belt Black belt under Ares co-founder Osvaldo "Queixinho" Moizinho
- 20+ 20+ years in jiu jitsu
- 61% Youth team: most wins end with the other kid tapping out (61%, against a California average of 52%)
Source: jits.gg youth record for this gym (listed there as Ares BJJ Stockton).

Raised in Stockton, trained under Ares
Your first roll is the scariest five minutes in the room.
Kalani "Coach K" Foster's was worse. Kalani's first roll went badly. A 115 pound kid broke his arm. Nobody had taught Kalani to tap. He came back the next day.
He grew up in Stockton, joined an MMA gym as a teenager to stay off the streets, and earned his black belt under Osvaldo "Queixinho" Moizinho, a co-founder of Ares BJJ. This is his gym, and here you learn to tap before you ever roll.
Three steps to your first class
Here's how your first class happens.
Pick a class on the schedule
Kids or adults, 5am or evening. Find the one that fits your week.
Ask for your free class
Send the short form or call (209) 889-5800.
Show up and roll
Coach K shows you how to tap first, then pairs you with a partner.
Jiu jitsu and eskrima in Stockton
Four ways onto the mat
Kids Jiu-Jitsu
Ages 5 to 13. Gi on Tuesday and Thursday at 5pm, no-gi on Friday at 5pm. The youth team starts here, for kids who want it.
See the kids programAdult Jiu-Jitsu
Gi class every weekday at 5am, plus Tuesday and Thursday at 6pm. Train before work, or after it.
Train before workNo-Gi
Friday at 6pm. Shorts and a rash guard, no gi.
See Friday night no-giEskrima
Filipino stick fighting with Coach K, the art he started at 8. Times set by arrangement.
Learn about eskrima
Also on the week: Combat Conditioning and Open Mat, Monday to Thursday at 6am, and Sunday Service, Sunday at 8am, free and open to all.
North Stockton · 95210
On Murray Dr, in the town Coach K grew up in
Buffalo Black BJJ trains at 7475 Murray Dr Suite #6, in north Stockton. Park free in the lot out front and look for Suite 6.
Kalani grew up here. In his words: "Growing up in Stockton, I understand the struggles of the environment. That's why our priority is to empower and give back to the community through hard work and martial arts."
It's a short drive from Lodi, Lathrop, Manteca and Tracy.
5.0 on Google · 7 reviews
What people say after training here
Top notch jiu-jitsu with a tight-knit family vibe. Showed up once and was hooked immediately.
Hector P., Google
Very good atmosphere, awesome people, and good Jiu-Jitsu. If you are in the area check it out.
Breno B., Facebook
Had an awesome class today. Great instruction and the guys were great. I will definitely be back.
Josh M., Facebook
Questions before your first class
What people ask before they come in
I'm out of shape and I've never trained. Is that OK?
Yes. You learn how to tap before you roll, and beginners are paired with partners who go easy while you learn. Coach K's own first roll ended with a broken arm because nobody taught him to tap. That's why tapping comes first here.
Will my kid get hurt, or turn into a bully?
Coach K coaches the kids himself, and you're welcome to watch. Kids learn to tap before they roll, so they always know how to say stop. The point is a kid who's steadier and kinder, not meaner.
How much does it cost?
Your first class is free, and no card is needed. Membership prices aren't posted online. Coach K goes over the options with you at the gym after your free class, or you can call or text (209) 889-5800 and ask first.
What should I wear to my first class?
A t-shirt and athletic shorts or sweats with no zippers or pockets. Bring water. You don't need a gi for your first class.
First class free · No card
Start this week, not next year.
Another school year goes by and your kid's still on the couch. You keep meaning to start, and the 7pm class keeps losing to the drive home. Nothing changes, because nothing started.
Tuesday at 5pm, or any weekday at 5am. Pick one.