
Yabiji Reef
Miyako Islands · Japan
Yabiji is the largest coral reef in Japan, a vast submerged plateau north of Miyako Island that emerges partially at extreme low tides and hosts an extraordinary diversity of hard corals across its 140 square kilometre extent. Sea turtles are permanent residents, grazing on the seagrass meadows that fringe the reef's sandy lagoons, while the outer edges deliver strong drift dives along fields of staghorn and table Acropora in pristine condition. The sheer scale of intact reef here — largely unaffected by development — makes Yabiji a benchmark site for coral reef conservation in the western Pacific.
Conditions
Depth
3 to 30 m
Open water and up
Current
Usually gentle
Can pick up on the edge
Visibility
15 to 30 m
Clearest in the calm season
Water
20 to 31°C
shorty
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 21 | 20 | 21 | 23 | 25 | 27 | 28 | 28 | 27 | 25 | 23 | 22 |
| Vis (m) | 20 | 20 | 20 | 20 | 20 | 15 | 15 | 15 | 15 | 20 | 20 | 20 |
| Current | Strong | Strong | Moderate | Moderate | Gentle | Gentle | Gentle | Gentle | Moderate | Moderate | Moderate | Strong |
Your chances of seeing each animal
Green Sea Turtle
Last confirmed Jun 19, 2026 · 2 records
Likely
About 6 in 10 dives
Ryukyu Scops-Owl
Last confirmed May 13, 2026 · 2 records
Rare
Now and then
Chinese Sea Krait
Last confirmed Nov 25, 2025 · 1 records
Rare
Now and then
Coconut Crab
Last confirmed Jul 29, 2025 · 1 records
Rare
Now and then
Acusta despecta
Last confirmed Mar 21, 2026 · 2 records
Rare
Now and then
Pacific Blue Crab
Last confirmed Oct 6, 2024 · 1 records
Rare
Now and then
Bumphead Parrotfish
Expected
Known here, not yet in recent logs
Humphead Wrasse
Expected
Known here, not yet in recent logs
Gear