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.
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About this site
Issai Kojima (一切小島) is a wall dive at Kashiwajima in Otsuki, Kochi, on a reef from 5 to 18 m just off the west side of the islet. A tunnel about 5 m long through the reef is packed with sweepers, the reef is coloured with soft coral, and offshore a stepped drop-off leads to a 35 m wall where black coral holds longnose hawkfish and seahorses. Circling the islet at an easy pace turns up butterflyfish, monocle bream and angelfish.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Lace CoralPocillopora damicornisReported here · unconfirmed
Hood CoralStylophora pistillataReported here · unconfirmed
Brown Staghorn CoralAcropora muricataReported here · unconfirmed
Salad CoralTurbinaria mesenterinaReported 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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