Adults

JAPANESE JUJUTSU

The dojo's core programme — Tsutsumi Hozan Ryu Jujutsu taught in the de Jong tradition that's been part of Perth's martial arts community since the 1950s. 

For adults who want genuine depth, not a fitness programme with martial arts branding. Most students start with one class per week.

Classes run Monday, Tuesday, and Wednesday at 6pm, plus Saturday at 9am. A women-only class also runs Wednesday at 5pm.

Teenagers

JAPANESE JUJUTSU

Teens 13+ train in the regular adult classes here. Not a separate youth programme. Same curriculum, same instructor, same expectations — treated as young adults, not children. 

Most teens start with one class per week, choosing a day that fits their schedule. 

Classes run Monday, Tuesday, and Wednesday at 6pm, plus Saturday at 9am. Female teens can also attend the women-only class on Wednesday at 5pm. 

That's either exactly what you're looking for or it isn't.

Children 6-12

YOUNG SAMURAI | JUJUTSU

A children's jujutsu programme for ages 6 to 12. 

The same curriculum as the adult programme, calibrated for young bodies — taught seriously, not turned into a games class.

Small classes. Your child is known by name from their first session.  Classes Monday and Tuesday at 5pm. Monday with B'Elanna Diaz, Tuesday with Andre Diaz. The dojo's principal instructor teaches your child personally.

Most children start with one class per week.

What this dojo is

Self Defence Central Dojo teaches Tsutsumi Hozan Ryu Jujutsu in the de Jong tradition. 

It is not a franchise. Not a fitness gym with a martial arts programme attached. Not a McDojo with belts handed out on a schedule. 

Four programmes. One curriculum. One lineage.  Taught by Andre Diaz in Osborne Park, Perth. 

Classes are deliberately small — usually eight to twelve students. Andre teaches most classes himself and knows each student by name. New students are paired with a senior practitioner for their first sessions. 

Most students start with one class per week. Two classes per week is where the art consolidates — most reach that frequency within a few months. 

If you are looking for a martial art that promises transformation, a short-term competitive programme, or quick results — this is probably not it. 

If you are looking for something serious that gets more interesting the longer you train — keep reading.

What is Japanese Jujutsu

Jujutsu is the parent system of several modern Japanese martial arts — judo, Brazilian jiu-jitsu, and aikido all developed from jujutsu traditions by emphasising specific aspects: ground work, sport, or movement principle. Where those arts narrowed their focus, jujutsu retained the complete system.

What's taught at Self Defence Central Dojo is Goshin Jujutsu — modern self-defence-oriented Japanese jujutsu — in the form developed and taught by Jan de Jong. It draws on classical Japanese jujutsu sources but isn't a preserved feudal-era system. It's a coherent curriculum refined within this lineage over more than seventy years of continuous teaching in Perth.

The complete curriculum covers joint locks, throws, strikes, ground work, and weapons awareness. Not a sport subset. Not a fitness format. A working system, calibrated to function under pressure.

Tsutsumi Hozan Ryu at this dojo is not a competitive or sport martial art. There are no tournaments and no point-scoring. Training is partner-based and cooperative — students work together to develop genuine capability, with periodic resistance testing to verify techniques actually work. The goal is real capability, not winning matches.

The de Jong tradition

FOUR GENERATIONS. UNBROKEN.

Jan de Jong established his jujutsu school in Perth in the 1950s. Over more than half a century he taught and refined the Tsutsumi Hozan Ryu curriculum in Western Australia, building one of the most significant traditional martial arts lineages in Australian history. 

Hans de Jong — 8th Dan — trained under his father and carries the tradition forward. 

Daniel Newcombe — Hans's senior student — was awarded the title of Shihan and established the Tsutsumi Hozan Ryu International (THRI) programme, extending the tradition beyond Western Australia. 

Andre Diaz trained in the same line under Hans. His 3rd Dan was awarded by Daniel Newcombe within the THRI programme. 

Two relationships. One lineage. 

The People

Andre Diaz — principal instructor Andre has trained in this tradition since 1985. He teaches at Self Defence Central Dojo himself. 

B'Elanna Diaz — instructor
B'Elanna has trained at SDCD since childhood. She leads Empower-Her and teaches Young Samurai. 

A small group of senior students and assistant instructors support classes across the week.