THRI is a modern, modular grading system for preservation of the jujutsu system, techniques and standard of the deJong Self Defence Schools syllabus, based on Tsutsumi Hozan Ryu Jujutsu
THRI is a grading system framework for preservation of the original jujutsu system, techniques, method of instruction and standard of the deJong Self Defence Schools syllabus, based on Tsutsumi Hozan Ryu Jujutsu
The deJong self defence system can be considered a gendai budo or modern budo as it consists of a foundation of Tsutsumi Hozan Ryu jujutsu, complemented with elements of yoseikan budo and pencak silat. All of these martial arts systems are renown for practical self defence effectiveness and comprise the deJong self defence system as taught in Perth, Western Australia since 1952.
THRI provides official international recognition of jujutsuka who have reached DAN grade level proficiency in Tsutsumi Hozan Ryu based jujutsu systems by providing a grading system framework including bridging course options to enable practitioners to undertake recognised DAN grades.
The formal THRI grading system and framework is published in a grading handbook and international passport. All grading sheets and step by step video instructions are included on this web site. 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
