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THRI Overview

Tsutsumi Hozan Ryu International (THRI)

THRI is an international style based organisation / committee started in 2015 by Sensei Dan Newcombe Principal Self Defence Central Dojo and Sensei Wim Mallens Principal Tadashii-do Karate ne Jiu Jitsu, both long term (30+ years) students of Shihan Hans de Jong, the Patron of the organisation. THRI is a non-profit organisation formed to provide a forum and framework for preservation of the original jujutsu system, techniques, method of instruction and standard of Jan de Jong and Hans de Jong and the martial art system of Tsutsumi Hozan Ryu Jujutsu between Self Defence Central Dojo (SDCD) and Tadashii-do, Netherlands and any other affiliated clubs or Instructors.

THRI provides official international recognition of jujutsuka who have reached DAN grade level proficiency in Tsutsumi Hozan Ryu based jujutsu systems. These grades may be as per the Hans De Jong Self Defence School Grading System, Self Defence Central Dojo and Tadashii-Do grading system or via a bridging course to enable practitioners to undertake DAN grades recognised by the Committee.

In collaboration with affiliated national and international jujutsu Instructors and clubs THRI will;

  • Provide a committee of recognised THRI DAN graded instructors to centralise, manage and promote internationally the original jujutsu system, techniques, method of instruction and standard of Jan de Jong and Hans de Jong’s jujutsu and self defence system;
  • Structure and modernise the original systems gradings in a way that enables a national and international standard to be applied and any affiliated clubs and Instructors can introduce the grading and assessment framework to provide an official and recognised standard;
  • Provide DAN level assessments and official THRI certificates signed by the Patron, International Coordinator and Committee Representatives;
  • Maintain and authorise a register of approved DAN graded THR Instructors affiliated with THRI only;

  • Provide a mechanism to share techniques and training material electronically and provide access to affiliated Instructors and Clubs.


The THRI Committee consists of the following:

  • Patron – Shihan Hans de Jong, 8th Dan THR
  • International Coordinator – Sensei Dan Newcombe, 5th Dan THR
  • Chairman Europe – Sensei Wim Mallens, 1st Dan THRI
  • Technical Directors in the following disciplines;
    • Jujutsu Technical & Historical
    • Teaching Framework
    • Childrens & Women’s Self Defence
    • Kobudo
      • Kenjutsu
      • Bojutsu
      • Manrikijutsu
    • Taihojutsu


The formal THRI grading system is published in a handbook, all grading sheets and requirements are included. The THRI grading system retains all of the historical design elements in addition to the unique defining features of THR Jujutsu including; reflex training (shinken shobu no kata), strong emphasis on mastery and continual application of the basics, gradual increase in attack type and defence variations, gradual increase in changing technique options and applications, emphasis on technical proficiency and practical self defence skills through continual revision and incremental improvement assessment.


THRI will maintain a formal register of recognised THR Sensei. Each applicant will be assessed on a case by case basis and will need to submit an online Assessment Request Application There are two methods of receiving formal recognition to meet the minimum standard of a DAN level instructor in THRI;

  • A pre-DAN bridging course, followed by the actual THRI DAN gradings.

  • A consideration by the Patron and Commitee of prior learning and contribution to the art scenarios which will be voted by the Commitee.

Pre-Dan Level Bridging Course THRI

If jujutsuka have been training elements of THR jujutsu or other equivalent styles of jujutsu but not at the THRI DAN level standard a pre-DAN bridging course is required to be undertaken. This is intended to ensure the THRI brand is not compromised, yet acknowledge that applicants are likely to be DAN grades or senior KYU grades in their own system. Once completed, the jujutsuka will receive a certificate of achievement (not grading/rank certificate) denoting that they have completed the bridging course and will then be eligible to begin assessment towards achieving DAN grades as per the standard THRI syllabus.

The bridging course will initially be assessed by an approved representative of the THRI and will consist of five components;

  • Revision grading presented in demonstration format, including a defined number of techniques from the THRI KYU grading syllabus.

  • THRI 1st KYU Shinken Shobu No Kata performed demonstration style

  • Theory – 10 multiple choice questions

  • History – 5 verbal questions

  • Terminology – 5 verbal questions

The content of the DAN gradings required to be undertaken is available in the THRI Grading System Handbook.

DAN Voting Recognition THRI

Voting is required for all jujutsuka who apply for an official THRI DAN grade recognition without undertaking the bridging gradings, these voting rules are purely for “Recognition of Prior Learning.” scenarios. This is intended to only apply to Senior / Principal Instructors from THR based jujutsu schools or existing jujutsuka whom have been previously DAN graded by the Patron, Shihan Hans de Jong or his father, Shihan Jan de Jong and/or known and recognised THR Instructors.

If students complete the endorsed pre-DAN grade bridging course assessment which have been assessed by recognised THRI DAN graded Instructors, then the voting for recognition rules do not apply.

THRI Assessment Request Application

Jujutsuka wishing to progress a DAN grade assessment, please follow the process below;

  • Complete the online application form, please allow up to 14 days for an initial response.

  • DAN voting applications are $15 including the signed and stamped certificate. No travel or grading costs are required only the certificate.

  • The pre-DAN bridging application is $85*, including the assessment of previous gradings conducted to determine the requirements for pre-DAN course gradings and assessments, and certificate of achievement. The 3 grading parts of THRI SHODAN are $50* each, and signed and stamped DAN certificate is $15. All gradings can be conducted at the SDCD THRI dojo in Perth, Western Australia or at the Dojo of the Club requesting the gradings.

*Travel and accomodation costs are not included, interstate and international applicants can travel to the Perth Dojo for assessment or optionally can pay the airfares of at least 2 THRI Senior DAN grades to travel to the Dojo seeking grading assessments (1 will always be the Patron, Shihan Hans De Jong pending availability).

Copyright @ Self Defence Central Dojo 2018