Getting AIDA2 Certified in Japan: The Complete Beginner's Guide

Here’s something most people don’t realize: you need zero diving experience to get freediving certified. AIDA2 is designed as a first course (it includes all AIDA1 content), and Japan — Okinawa and Izu in particular — is one of the most underrated places in Asia to do it.

Why Japan

• The water: Cape Maeda in Okinawa runs 20–30 m visibility most of the year; Osezaki in Izu is a sheltered bay with reliably calm training conditions
• The trip: certify on the way through a Japan holiday — one flight, two wins
• The crowds, or lack of them: unlike the certification conveyor belts of Southeast Asia, Japanese freediving schools run small — often just three or four students per instructor

What AIDA2 requires

Looks intimidating? A two-minute breath-hold is taught, not forced. Once you understand the urge to breathe (spoiler: it’s CO₂, not lack of oxygen) and learn to actually relax, most beginners pass 2:00 on day one in the pool.

How the course flows

Using our AIDA2 course as an example, the standard 2–3 day rhythm:

1. Day 1 · Theory + pool: pressure and equalization, the physiology of breath-hold, the dive reflex; then static and dynamic work in the pool
2. Day 2 · Open water: buoy and line setup, duck dives, line dives to 10–12 m, buddy protocol and rescue practice
3. Day 3 · Open water + exam: the 12 m certification dive (deeper practice to about 16 m if you’re ready), then a relaxed written exam

Before you book

• Age 18+ (16–17 with guardian consent)
• Able to swim 200 m without stopping — any stroke, any speed
• Health questionnaire: asthma, ear surgery or heart conditions need a doctor’s sign-off
• Don’t schedule dives with a blocked nose — equalization won’t work and you’ll waste the day
• AIDA2 and AIDA3 run with a minimum of 2 participants at every location. Travelling alone? Book anyway — we register you and pair you with another student on nearby dates; if nobody else books that period, the course may not run. The schedule page shows dates that already have one person waiting.

The two most common failure points

Equalization: start practicing the Frenzel maneuver a week early on land — pinch your nose, close your mouth, push air with the back of the tongue. Tunnels and airplane descents are free practice time.

Tension: freediving is a sport where trying harder makes you worse. The relaxation technique your instructor teaches matters ten times more than your lung capacity — which is exactly why self-teaching stalls and coached students progress fast.

When to come

• Okinawa: year-round. Summer water is a comfortable 27–29°C; winter runs 21–22°C in a 5mm wetsuit — and you’ll have the sites nearly to yourself
• Izu: best May–October (July–September is the most comfortable), two hours from Tokyo — ideal for a weekend certification if you’re based in Honshu

Budget

Course fee ¥48,000 covers tuition and the AIDA registration/certification fee. Equipment rental, site fees (pool entry, parking, facility use) and transport to the dive site are not included. Weights are free; a full rental set is ¥3,500 per day. In Izu, budget about ¥2,000 for pickup from Tokyo, ¥2,000 for the pool day and ¥0–3,000 per ocean day in site fees — see the course page for the full list. In the off-season, flights from Tokyo and three nights’ guesthouse can come in around ¥35,000.

Ready? See the course details or just ask us — in English is fine.