Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
Dived here today? How were conditions vs. what we showed?
About this site
Futago Iwa (二子岩) is a shallow coral-reef pinnacle 20 minutes by boat from Chichijima in the Ogasawara Islands, Tokyo, with a maximum depth of 16 m and an average around 10 m. There is a small arch, boxer crabs are numerous and nudibranchs are plentiful, with decorator crabs, striped large-eye bream and damselfish also present. Current runs at times; intermediate and above.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Yellow TangZebrasoma flavescensReported here · unconfirmed
Lollyfish Sea CucumberHolothuria atraReported here · unconfirmed
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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