Jw 🇳🇱

Jan Wouter Wiersma

Brown belt Verified by the community1,550 / 700 points

ExistDe Meern, Netherlands7 years on the mats

480 profile views · Last seen 1 day(s) ago

#3,355worldwide by community verification points

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About

Training since first belt7 year(s) and 4 month(s)
Medals235810

BirthdayOctober 18, 198639 years old
LocationDe Meern, Utrecht, Netherlands
AcademyExist Unclaimed
AffiliationJiu Jitsu Factory

Training history

Achievements

4 of 19 unlocked

Coach with confirmed students

Profile manually reviewed & certificate issued

Current rank verified by promoting instructor

Name verified by credit card

Verifications received17 / 25

102550

Years trained7 / 10

5101520

Gold medals5 / 10

51025

Competition matches0 / 10

1050100

Forum posts0 / 500

5001,000

Coaches

Sander Zurhake

Black belt

Jiu Jitsu FactoryUtrecht, Netherlands

Alex Ramirez

Black belt 3rd degree

Bjj HermanosLeiden, Netherlands

Students

Michael

Mike

Wall

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JwJul 17, 2025

Sorry guys my bad. Changed it to 2025 👍

Roel FleurenJul 13, 2025

Brown belt promotion was in 2025, not 2023. Looks like a type-o. I was there.

Anthony RestucciaJul 9, 2025

There's a bit of a problem with your promotion dates. According to this, you got your purple belt 5 days after you got your brown belt...

Gallery

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Promotion history

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Brown belt Current belt
July 2, 2025Jiu Jitsu factory
1 year, 2 months, 29 days
Promoted by
Hans Stringer
- Stripe 2July 8, 2026
Purple belt
June 26, 2023Exist IJsselstein Nederland
2 years, 6 days
Promoted by
Hans Stringer
- Stripe 1January 8, 2024
- Stripe 2July 15, 2024
- Stripe 3July 15, 2024
- Stripe 4December 30, 2024
Blue belt
March 28, 2021Utrecht
2 years, 2 months, 29 days
Promoted by
Iwan HansenCONFIRMED
First stripe july 18th , dec 18th , july 4th
White belt
June 1, 2019Exist
1 year, 9 months, 27 days
Hans Stringer

Votes received for current rank

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Daniël Bertina

Black belt 3rd degree

+175 pts

"Training buddy at Exist Jiu-Jitsu Club. Footlock devil. 100% legit."

Verified3 day(s) ago

Philip Dunlap

Black belt 3rd degree

+175 pts

"Legit profile congrats on the brown"

Verified1 year(s) ago

Ruud Van Hintum

Black belt 2nd degree

+150 pts

"Congratulations on the brown belt, JW! Gehaktdag sparring friend! Very legit!"

Verified9 month(s) ago

Iwan Hansen

Black belt 1st degree

+125 pts

"Congrats JW "

Verified1 year(s) ago

Juan De La Fuente Briones

Black belt 1st degree

+125 pts

"Congratulación "

Verified1 year(s) ago

Sander Zurhake

Black belt

+100 pts

"One of those students that are very coachable and actually try to apply the technique and concepts during life rolling and competition. Therefore an excellent trainingpartner!"

Verified1 year(s) ago

Roel Fleuren

Black belt

+100 pts

"Congrats, JW!"

Verified1 year(s) ago

Jan Jeronimus

Black belt

+100 pts

"JW is a true athlete who combines his physical abilities with solid technique and a strong fighting spirit. His brown belt is well-deserved and legit."

Verified1 year(s) ago