First Principles - Jujutsu

A course. Not a trial

There's a difference between trying something and starting it. 

A trial class lets you sample — you see the room, you meet the instructor, you get a feel. That's real and it's available here any time. But a trial doesn't teach you jujutsu. It shows you jujutsu from the outside. 

First Principles is structured from session one as the beginning of the art — not an introduction to whether you might want to begin. You'll wear a gi from the first lesson. A sequenced four weeks where each lesson earns the next. By the final session you'll have two techniques, five attacks, and the principles connecting them. More importantly, you'll understand why they connect. 

The course fee includes your gi. You'll wear it from session one — and leave lesson 4 with something on it that wasn't there when you arrived. 

Four lessons. One class a week. Twelve students maximum.

How the four weeks is structured

Lesson 1 — Position and movement 

Every technique begins with position. You'll learn kamae — ready posture — and two fundamental movements: irimi (entering) and irimi senkai (entering with rotation). From the first session you'll train with a partner, learning how to attack safely, receive safely, and perform your first jujutsu technique against a genuine attack. 

Lesson 2 — Balance Before Technique

Technique doesn't create success — good positioning and unbalancing do. This lesson explores how balance is taken, how resistance reveals mistakes, and why effective technique feels effortless when the conditions are right. Your first joint lock is introduced here, along with the partner communication required to train safely. 

Lesson 3 — Adaptability under pressure 

What happens when you're late? This lesson introduces nagashi (flowing) — the ability to flow with an attack rather than meet it head-on. You'll discover that the same technique can emerge from many different attacks when the underlying principles are understood. 

Lesson 4 — Reading, responding, integration 

The final lesson brings everything together. Strikes and grabs. Patience, recognition, response — according to what is actually happening rather than what you expect. Reflex training: an attack you don't know is coming. Taisabaki first. Then whatever the position makes available. That's jujutsu.

What the first session is like

You'll arrive, get changed, and meet the other students in the group. 

Andre will explain what the four weeks covers and what's expected of you — briefly, without over-explaining. 

Then you move. 

Kamae first — how to stand. 

Then irimi, how to enter. 

Then a middle punch, how to deliver one safely and how to receive one. 

By the end of the first hour you'll have done your first jujutsu technique against a genuine attack, and taken your first sideways breakfall. 

You'll leave having done something, not just watched something.

Worth a quick message?

Have a question? Ask anything. Andre replies personally — what it's like in the room, whether your situation works, anything at all. Tap the button and it opens Messenger with a message already written — just hit send, or change it to whatever you actually want to ask. 

No commitment, no booking.

Who teaches it

Andre Diaz owns and runs Self Defence Central Dojo. He holds the rank of Sandan (3rd Dan) in Tsutsumi Hozan Ryu Jujutsu and has been training in the Jan de Jong lineage since 1985 — nearly forty years. 

First Principles is taught by Andre directly. Not delegated to a senior student, not shared across instructors mid-course. The same person teaches all four lessons — because the rapport built in lesson one is what makes lesson four's reflex training land the way it should. 

Andre trained under Shihan Hans de Jong, who received the art from his father Shihan Jan de Jong — one of the most significant figures in the transmission of Japanese jujutsu outside Japan. This is the lineage the course is built from. It matters because jujutsu has depth that takes decades to transmit — and what's taught here comes from someone who's been receiving that transmission for nearly four decades. 

The instructors who teach First Principles teach the dojo's regular jujutsu classes too. They train every week themselves.

What this course is not

Not a grading preparation course. 

The first adult grade is 4–6 months of twice-weekly training. First Principles is where that journey starts — not a shortcut through it. 

Not a sampler. 

The art has throwing, ground work, weapons, and decades of depth. None of that is in these four weeks. What's here is the reason all of it works. 

Not a trial with structure around it. 

Walk-in trials are available year-round. They're a different thing and they serve a different purpose. If you enrol in First Principles, you've decided to start — not to decide whether to start.

The details

Duration: 4 weeks, one session per week 

When: Monday evenings, 7pm-8pm 

Cost: $149.  

- Includes your uniform (gi)
-Twelve students maximum. 

Where: Unit 7a, 44 Hutton Street (above Primefit Gym)
— free parking directly outside 

What to wear: Trackpants and a t-shirt. You will receive your uniform on the first session (so come at least 15mins early) 

What to bring: A water bottle

Not sure which intake suits you? Just say when you message. And if you have to miss a session, we'll help you catch up so you don't fall behind.

If it's not for you

The first lesson is the most accessible — kamae, movement, one technique.  By the end of lesson two, joint locking with pain compliance has been introduced.  

If by the end of lesson two the course isn't what you came for — full refund. Andre may ask why, not to deny it, but because understanding what didn't land is how the course gets better.

What happens after the course?

The course ends with a clear picture of what comes next — regular classes, the grading pathway, and a continuation offer if you want to keep going. There's no obligation. You'll know what feels right once you've done it.

The next step

If this feels like the right kind of start, the simplest next step is a message. 

You don't need to book or commit — just ask whatever you need to decide. Scheduling, prior experience from another art, a physical limitation, anything specific to your situation — that's exactly the kind of thing worth a message rather than treating as a reason not to come. 

Under 18? You're welcome in the course, you'll just need a parent's ok first.   Here is a page to share with them:

Tap below — Messenger opens with a message ready to go. Andre will reply.
It's a conversation, not a sign-up.

Prefer something else?