Ukon Denchi

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What you'll see (15)

Fire DartfishNemateleotris magnificaseen 4× near here

Tawny Hermit CrabCoenobita rugosusseen 4× near here

Small Giant ClamTridacna maximaseen 2× near here

Tomato ClownfishAmphiprion frenatusseen 2× near here

Chinese Box TurtleCuora flavomarginataseen 2× near here

Emperor AngelfishPomacanthus imperatorseen 2× near here

Elegant PhyllidiaPhyllidia elegansseen 2× near here

Giant MorayGymnothorax javanicusseen 2× near here

Ambon Cleaner ShrimpLysmata amboinensisseen 2× near here

Blackspot SergeantAbudefduf sordidusseen 2× near here

Longnose FilefishOxymonacanthus longirostrisseen 2× near here

Smooth Red-eyed CrabEriphia sebanaseen 2× near here

Blacksaddle TobyCanthigaster valentiniseen 2× near here

Palette TangParacanthurus hepatusseen 2× near here

Spotted Garden EelHeteroconger hassiseen 2× near here

Planning a trip

6–8 days

worth going for

Long flight and a domestic connection.

3,353km from Singapore — about 18h each way, so two of those days are travel. 2 dive sites within 25km.

When people dive it

Busiest Mar, May, Jun, Aug, Sep · almost nobody dives it Jan.

From 1,789 logged sightings — when divers are in the water, which is not quite the same as when visibility is best.

Dive Crew is a dive group from Singapore. Members plan trips here, log their dives, and share their photos of each site.

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Moon and tides

Waning gibbous

71% lit · day 20 of the lunar month

Neap tides

Neap tides — the smallest range of the month, so the weakest currents. Easy conditions and usually the clearest water, though a drift site may barely drift.

New 10 Oct Full 26 Oct

Phase computed here, not fetched. This is the spring/neap cycle, which sets how hard the water moves — not a tide table: no free source publishes high and low water for Southeast Asian reefs, and the range peaks a day or two after the moon does, by an amount that varies with the coast. For times on the day, ask the operator.

Getting there

~7h 39m

door to water, each way · 3 legs

FlightIshigaki (ISG)~7hFlight time plus the airports at both ends. A connection adds to it.Find flights →
Transferthe jetty~9 minFor the Yonaguni formation and the Yaeyama manta season.Directions →
Dive boatUkon Denchi~30 minThe last leg is always a boat — a dive site has no address.

📍 Ukon Denchi on Google Maps 🧭 Route from Ishigaki

Times marked ~ are estimated from straight-line distance and will be roughly right at best. The road legs are the ones Google Maps answers properly; it will not plan the ferry or the dive boat at all. A dive site's coordinates put a pin in open water, so the map link drops you on the site, not on a jetty.

Details

Country: Japan
Marks: 24°16.024'N 124°5.446'E
Position: 24.2671, 124.0908

Where it is

Loading the map…

Nearby

Middle Book3km

Sightings and photographs from iNaturalist contributors, research-grade records within 6km, under Creative Commons licences. Counts are what divers and snorkellers have bothered to log — a common fish with few records is common all the same.