Grand Opening
Open House
Saturday Aug 8th, 10am-2pm
Games · Prizes · Open Mat Rolling · Food & Drinks!
First 50 members lock in founding rates for life. Sign up on Saturday 8/8!
Foster City · Brazilian Jiu Jitsu

Jiu Jitsu
for the wholefamily.

Walk in on day one with zero experience and you'll be fine. Kids, parents, and grown grapplers all train here. We teach real jiu jitsu, and we teach it in a way that keeps you healthy enough to still be doing it in twenty years. You'll be coached by IBJJF black belts, including a 2x World Masters champion and a black belt with almost two decades on the mat who coaches kids and adults alike.

5
Program tracks
4+
Ages & older
01 Programs

A mat for every
age and goal.

Whether it's a four-year-old's first day or a 50-year-old getting back in shape, it's the same jiu jitsu underneath, just taught at the right speed for whoever's on the mat.

Kids · Lil' Sumos 1

Lil' Sumos 1

Our littlest kids think they're just playing games. They're actually learning to move, listen, and hold their own. That's the jiu jitsu sneaking in.

Ages 4 to 6 · Uniform (Gi)
Kids · Lil' Sumos 2

Lil' Sumos 2

The next step up. Sharper technique, some live reps against a partner, still plenty of fun. This is where it starts to click for a lot of kids.

Ages 7 to 10 · Uniform (Gi)
Kids · Youth BJJ

Youth BJJ

Real jiu jitsu for older kids and teens. We hold them to a real standard here: technique, discipline, and knowing how to handle themselves.

Ages 11 to 15 · Uniform (Gi)
Adults · Start here

Fundamentals

You can start any week. The curriculum rotates, so there's no "you missed the beginning." We teach every position from scratch. Never trained? Perfect, this is the class for you.

Adults · Uniform (Gi) · All levels
Signature track

Longevity BJJ

This one's for older students who still want to train hard without paying for it the next day. Warm up the joints properly, roll controlled instead of wild, leave the ego at the door. The whole point is that you're still on the mat at 70.

Adults 45+ · Uniform (Gi) · Low-impact
Read more
Not sure where to start?

Try a class

First class is free. Come in, tell us who's training, and we'll point you to the right class.

Book a free trial →
Saturday = Family Day

Saturday mornings, parents get on the mat with their kids. Same class, same drills, everybody learning together. It's our favorite class of the week.

02 Weekly Schedule

When to be
on the mat.

A sample week to plan around: kids in the afternoon, adults in the evening. Exact times are confirmed at launch, so book a trial and we'll get you into the right class.

Mon
4:00 to 4:45p
Lil' Sumos 1 (4 to 6)
5:00 to 5:45p
Lil' Sumos 2 (7 to 10)
6:00 to 7:00p
Fundamentals (Adults)
7:00 to 8:00p
Open Mat
Tue
5:00 to 5:45p
Youth BJJ (11 to 15)
6:00 to 7:00p
Longevity BJJ
Wed
4:00 to 4:45p
Lil' Sumos 1 (4 to 6)
5:00 to 5:45p
Lil' Sumos 2 (7 to 10)
6:00 to 7:00p
Fundamentals (Adults)
7:00 to 8:00p
Open Mat
Thu
5:00 to 5:45p
Youth BJJ (11 to 15)
6:00 to 7:00p
Longevity BJJ
Fri
6:00 to 8:00p
Open Mat · Community
Sat
9:00 to 9:45a
Lil' SumosFamily ClassKids + parents on the mat
10:00 to 10:45a
Lil' Sumos 2Family ClassKids + parents on the mat

Sample schedule. Final times confirmed at academy launch.

03 Membership

Simple pricing.

One membership, full access: all classes, Uniform (Gi), and open mats. Your first class is always free, so come roll before you commit.

Founding 50

Be one of our first 50 members!

The first 50 people to sign up lock in an additional founding-member discount for life, plus a free uniform, t-shirt, and swag. It's our thank-you for building the room with us. Once we hit 50, it's gone.

Claim Your Founding Spot
Flexible

Month-to-Month

$275/mo
No contract, cancel anytime. Full access to every program.
  • Unlimited classes, all programs
  • Uniform (Gi) & Open Mat
  • Kids, adults & Longevity tracks
Book Free Trial
Save $25/mo

6-Month Commitment

$250/mo
Six months in, at a lower monthly rate.
  • Everything in Month-to-Month
  • $25/mo savings, $150 over the term
  • Locked-in rate for the whole term
Book Free Trial
Best Value · Save $50/mo

12-Month Commitment

$225/mo
A full year at the lowest monthly rate.
  • Everything in Month-to-Month
  • $50/mo savings, $600 over the term
  • Locked-in rate for the whole term
Book Free Trial

All plans include full access for kids, adults, and Longevity.

It's in our name

The Family That Rolls Together

We're Sumo's Family Jiu Jitsu, so when your family trains together, everyone saves. Add family members to your household and the discount grows with each one.

1st Member
Full
Standard rate
2nd Member
15% off
Every month
3rd + Member
20% off
Each additional

Applies to immediate family in the same household, on either membership plan. Bring the whole crew. Ask us to set it up at your free trial.

04 Instructors

Meet your
instructors.

The only BJJ gym in Foster City. A clean room where a kid's first class and a black belt's hardest round get taught with the same care, by two coaches who've spent their lives on the mat.

Matt 'Sumo' Shriner, head instructor at Sumo's Family Jiu Jitsu
Head Instructor · Founder

Matt "Sumo" Shriner

Matt is a BJJ black belt and 2x IBJJF World Masters champion, promoted under coral belt Marco Nascimento. Before jiu jitsu he earned a black belt in full-contact karate and competed in Japan, and trained Muay Thai at Fairtex in Thailand. Longevity BJJ came out of those years on the mat: a way to keep training hard without the body paying for it as you get older.

BJJ Black Belt2× IBJJF World MasterKarate · Muay Thai · BJJ
Matt 'Sumo' Shriner at a full-contact karate tournament in Japan
Japan International Karate Competition, Tokyo 2005
Matt 'Sumo' Shriner delivering a kick in a karate match in Japan
Black Belt Karate Competition
Rafael Fidelis
Co-Instructor · Coach

Rafael Fidelis

Raf grew up in São Paulo and started training under Marco Nascimento in 2007, the same lineage as Matt. He's coached at the academy since 2019 and teaches both the kids and the adults. He's got the patience for a room full of six-year-olds and the technical depth to push a competitor. Kids love him. So do the adults.

1st Degree BJJ Black BeltKids & AdultsSão Paulo, Brazil
Rafael Fidelis competing in a Brazilian Jiu Jitsu match
Raf competing, IBJJF
05 Visit / Free Trial

Your first class
is on us.

Location
939C Edgewater Blvd
Osaka Marketplace / Edgewater Plaza · Foster City, CA 94404

Your first class is on us.

Let us know who's training and we'll get back to you within a business day to book your free class.

Book My Free Trial →
Takes 30 seconds. No spam, ever.
06 The Network

Our Community

Jiu jitsu is bigger than any one gym. These are academies we know and vouch for. If you're outside Foster City, or you just want another good room to roll in, go train with these folks. Tell them we sent you.

Our Professor · Our Lineage

Marco Nascimento BJJ

The home of our professor and lineage. Led by 6th-degree coral belt Marco Nascimento, MNBJJ in San Mateo is one of the finest academies on the Peninsula, with world-class instruction.

Visit Marco Nascimento BJJ
07 The Story

Why the name
“Sumo”?

It's a fair question. Early on, Matt often competed in the Ultra Heavy (aka “Unlimited”) category, usually giving up plenty of size to the bigger competitors out there. Somewhere along the way the nickname “Sumo” stuck, and it's followed him ever since, even though these days he's usually in the Super Heavy bracket.

Matt 'Sumo' Shriner squaring off at Ultra Heavy
Matt 'Sumo' Shriner in a scramble against a larger opponent
Matt 'Sumo' Shriner celebrating a win
The SUMO BILL patch fresh off the press
Matt 'Sumo' Shriner cageside at World Master

* And why Sumo “Bill”? Well, that’s a whole other story…