Mats Tverin Kyoshi

Founder of Ronin Do Karate & JuJutsu, as well as President of Ronin Do International.
Kyoshi Tverin started training martial arts at the age of 13 and has been active ever since,
Kyoshi Tverin trained under Grandmaster Ernesto Castro for over 20 years. Castro was a private student under Raymond Cocatré and Technical Director of R. Cocatré int. They Bushido.
In the early 90s, Kyoshi Tverin trained and taught Muay Thai and at the same time trained boxing at BK Vargen in Karlstad (1990-1992).
In 1995 Kyoshi Tverin started training Taekwondo (WTF) which he continued until 2007.
On the competition side, there have been points in Karate, Taekwondo and Kickboxing, where there have been some wins and medal places. However, Kyoshi Tverin stopped competing at the age of 25 and has focused on technique and coaching ever since.
Kyoshi Tverin has sat on the board of the Medical Committee of Swedish Budo & The Martial Arts Federation from 2009 to 2013 and the Swedish Kyokushin Federation from 2012 to 2013.
In January 2011, Kyoshi Tverin was inducted into the Action Martial Arts Magazine Hall of Honor. Kyoshi received ”Outstanding contribution to the Martial Arts” at this event which took place at the Tropicana Hotel in Atlantic City, USA.
Kyoshi Tverin has received this award on two more occasions. January 2013 and January 2015.
September 2015, Kyoshi Tverin was inducted into the International Hall of Fame in Cape Verde.
Over the years, Kyoshi Tverin has received several awards in various Hall of Fames. Four times in Lisbon, May 2011, May 2012, May 2014 and May 2015.
In 2009 Kyoshi Tverin was inducted into the Imperial Hall of Fame in Split, Croatia, and in June 2009 into the ”London International Martial Arts Hall of Fame”.

Kyoshi Tverin has the following degrees In other species/styles:
8 Dan 八段 JuJutsu (Hachidan). April 2 – 2022 Kyoshi.
7 Dan 七段 Taiho Jutsu (Shishidan). April 2 – 2022 Kyoshi.
7 Dan 七段 Karate (Shishidan). October 7 – 2022 Kyoshi.
5 Dan 五段 Nihon Kobudo (Cala Montjoi, Spain. June, 2012).
3 Dan 参段/三 WTF Taekwondo (May, 2008).
1 Dan 初段 Aikido “Cocatre” (June, 1994).

Kyoshi Tverin is certified in:
Instructor training, Swedish Budo & Martial Arts Association.
Certified Instructor, MMA Association.

Like many other practitioners, Kyoshi Tverin found it impossible to stay with his old organization and was thus forced to go his own way, which led him to start Ronin Do International. This is largely due to his dedicated knowledge in biomechanics, neurology and sports psychology.
Since its inception in 2005, Ronin Do International has grown and is now present on three continents – Europe, Asia and South America.
Kyoshi Tverin is a sought after instructor internationally and has taught in the USA, Great Britain, Spain, Germany, Portugal, Belgium, Denmark, France, Croatia and of course in Sweden where the Honbu Dojo is located.
The Ronin Do style itself is a modern self-defense system that includes Karate, JuJutsu and Kickboxing. All techniques that only fulfill a historical value have been removed, and all techniques are adapted to ensure they are as effective as possible, based on modern sports physiology and psychology, but with a strong focus on practitioner safety.

Kyoshi Tverin is featured in Ted Gambordella’s book ”The Worlds Greatest Martial Artists” and the book ”The 300 Best Martial Artists of the World”.

Luis Fernando Hanshi

Military Self-defense Instructor at the Portuguese Air Force.
Police Self-defense Instructor – International Police and Security Association.
Safety and Security Instructor.
Vice President of the International Budo Union.
Intervention Corps and Special Operations Group – PSPp.

10 Dan Goshinjujutsu
9 Dan Taihojutsu
3 Dan Budo Judo
3 Dan Nihon Taijutsu
3 Dan Aikijujutsu
2 Dan Nihon Kobujutsu
2 Dan Judo
1 Kyu de Karate

Johan Skålberg Punong Guro

Founder of Kali Sikaran International and a very sought after seminar instructor and coach. Teaching tactical units, professional athletes, instructors and corporations all over the world.
Punong Guro Johan Skålberg started with Martial Arts 1973 and a journey of research, experiences and learning has become a passion and a lifestyle.

As an early FMA pioneer he introduced Kombatan, Inayan Eskrima and Kali Sikaran to Scandinavia and has promoted his knowledge within these arts all over the world.
Today he mainly promotes his interpretation of these arts within Kali Sikaran International (KSI).

Johan Halldin – MMA

Johan Halldin began his martial arts journey with judo in 1980. 30 years ago he also began experimenting with what is today known as MMA. Among other things, he holds a black belt (5th dan) in Jujutsu and a brown belt in Brazilian Jiu-Jitsu (BJJ).

Johan has founded and run five martial arts clubs, including Berserk MMA, which has been around for 20 years.

Yoel Grundemark – Instructor in MMA and Police self-defense instructor

Sensei Grundemark started with martial arts in 1998 and has been selected in the National Team groups in JuJutsu and in Brazilian Jiu-jitsu.

3 Dan BJJ

Merits:
Kalmar Cup: Gold (JJ) * Swedish Open Silver (JJ) * Dala fighten 2x Gold * Nordic Cup: Bronze (JJ) * Dutch Open: Silver (JJ) * Dala Fighten Silver (JJ) * ExhaleChampionship, Silver (BJJ) * Scandinavian Open open weight class: Bronze (BJJ) * Kaisho Cup, Blue Belt: Bronze (BJJ) * Danish Open, Blue Belt -Silver, (BJJ) * Danish Open, Open weight class Blue Belt Bronze (BJJ) * European Open, Blue Belt Open weight class: Silver (BJJ) * Swedish Open bronze.(JJ) * Västerås BJJ Cup Blue Belt : Silver (BJJ) * Västerås BJJ Cup Open weight class: Bronze (BJJ) * Bad Boy Cup, blue belt , silver (BJJ) * Bad boy Cup open weight class: Bronze (BJJ) * European Open team: Gold (BJJ) * Stenungsund Open Purple belt: Bronze (BJJ) * Stenungsund Open Purple Belt: open, Bronze (BJJ) * Stockholm Open, Purple Belt: Silver (BJJ) * Scandinavian Open Purple Belt: Silver (BJJ) * ESWT :Silver (SW) * Kaisho Cup: Purple Belt: Silver (BJJ) * Grapplers Paradise: Open weight class: Bronze (SW) * Gameness Championship :Bronze (SW) * Alive Tournament: Silver, (SW) * Stockholm Open :brown belt: Silver (BJJ) * Alive Tournament: 2x Bronze * Las Vegas Open : brown belt: Bronze (BJJ) * Las Vegas Open Open weight class: Bronze (BJJ) * American Nationals No Gi: Silver (BJJ) * American Nationals No Gi Open: Bronze. (BJJ) * Alive 2010 Finals: Gold. (SW) * Scandinavian Open Black Belt Open weight class: Bronze (BJJ).

Pavel Antonsson Shihan

Pavel Antonsson has authored books written in both Swedish and English:
”Dokan Ryu- Ju Jutsu & Budō Densho”
”Dokan Ryu Ju Jutsu för nybörjare- Tekniker till gult bälte”
”Karate Jutsu för nybörjare”
”Kobudo- Kirikami 1st Dan”
”Shoden- Dokan Kogaku Kobujutsu Kenkyukai”.

Okuden Shihan
8 Dan Kyoshi Nihon Ju Jutsu
3 Kodokan Judo
3 Dan Kano Ryu Nihon Jujutsu
5 Dan Renshi Karate Do
4 Dan Master Jidokwan Taekwondo.

He also holds black belt degrees and licenses in classical Budō and two different sword schools.