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A scuba diver creates a trail of bubbles while exploring the deep ocean underwater.
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Ukon Denchi

3.5 — based on 14 community signals
4.1 12 species 16 contributors

Ukon Denchi is a year-round dive site in Japan with 12 recorded species observations and healthy coral conditions.

⭐ Best for intermediate divers.

updated 4 months ago
Shore entryFamily-friendlyBeginner

At a glance

Activity
dive
Best months
Year-round
Marine life
Nudibranch

Map

This spot Airport Nearby spots
Ukon Denchi location map © Google · Map data © Google, contributors
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Conditions today

Conditions

Open-Meteo
Wind
8.1 kn
Wave
0.92 m
Water
28.9°C
N E S W
Wind direction (7d)
Primary: N (40%)
Now: N (3°)
Tide (7 days)
range: 1.44m

Next: Low at 06:00 (+0.54m)

+1.7 m+0.3 m
▼ 06:00 · +0.54m ▲ 14:00 · +0.97m ▼ 15:00 · +0.96m ▲ 23:00 · +1.27m
Sat 19Sun 20Mon 21Tue 22Wed 23Thu 24Fri 25
UV8.2 · very high Air PM2.513 · moderate 06:30 18:43
Day Wind Wave UV Rain
09-19 10.9 1.02 8 0mm
09-20 16 1.78 8 0mm
09-21 13.3 1.72 8 1mm
09-22 8.9 1.22 8 0mm
09-23 10 1.04 8 2mm
09-24 6.8 0.64 8 6mm
09-25 7.3 0.64 8 1mm

About this spot

Ukon Denchi offers Japanese divers a consistent diving option with documented marine life. The site has recorded 12 species observations, indicating a populated reef system worth exploring. Coral conditions show no stress, suggesting the ecosystem remains in stable health. The location falls outside a marine protected area, making access straightforward for visiting divers. Divers should plan their visit with local conditions in mind, as specific depth, visibility, and water temperature data are not yet widely documented. This makes Ukon Denchi ideal for divers willing to work with local guides who understand seasonal variations and site-specific conditions. Year-round accessibility means you can plan your Japan dive trip around other activities without seasonal constraints. The 12 species observations provide a baseline for what marine life you might encounter, though exact composition varies seasonally. Bring a local dive operator into your planning—they'll know current conditions, entry points, and any site-specific gear considerations. Ukon Denchi remains a solid option for exploratory diving in Japanese waters.

📖 Guide: Diving in Japan: 42 Sites from Sharks to Stone Monuments

Best months

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Marine life

Nudibranch

Dive types

Reef

Trip essentials

Everything you need before you pack — checklist, sun, logistics.

Trip checklist

  • 🛂 Visa-free or visa-on-arrival
  • 📜 C-card + dive insurance (DAN)
  • 📔 Dive logbook
  • 🧴 Reef-safe sunscreen SPF 50+
  • 🔌 Plug type A/B · 100V adapter
  • 💊 Seasickness meds + ear drops
  • 📱 Offline maps + emergency contact

Quick facts

  • 🌓 Moon First quarter · 47%
  • GPS
Sustainability disclosures
🌍 CO2 footprint LHR ↔ 10011km · ~2303kg · €41

FAQ

Can I dive Ukon Denchi year-round?

Yes. Ukon Denchi is accessible throughout the year, so you can plan your dive trip based on your schedule rather than seasonal windows.

What depth and difficulty level is Ukon Denchi?

Specific depth and difficulty ratings are not yet well-documented for this site. Contact a local dive operator before your visit to confirm current conditions and ensure your certification matches the dive profile.

What marine life can I expect?

Twelve species observations have been recorded at Ukon Denchi. A local guide can detail which species are currently active and where to find them on the reef.

Do I need permits or special access to dive here?

Ukon Denchi is not inside a marine protected area, so access is straightforward. Always dive with a qualified local operator who knows current regulations and conditions.

Recently spotted by divers

iNaturalist →

If conditions don't work

Activities nearby or alternative spots — keep your trip going.

Visibility (month-by-month)
Best: Feb (100/100) Worst: Jun (0/100) Now: Sep (63/100) NOAA MODIS Aqua · 5y mean

Nearby spots

Middle Book Japan Diving
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Middle Book

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Yonaguni — Underwater Monument

Advanced dive site near Japan's southern islands featuring a mysterious underwater monument structure between 5–30m.

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アントニオガウデイ Japan Diving
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アントニオガウデイ

Year-round diving at Obi-iwa, Japan's distinctive rock formation with healthy coral and strong local species presence.

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