Osezaki
Izu Peninsula · Japan
Osezaki is Izu's crown jewel for macro photography, where a sloping volcanic reef drops to 25 metres and hides extraordinary concentrations of nudibranchs, frogfish, and pygmy seahorses in every crevice. The site's cold, nutrient-rich currents from Suruga Bay keep the water productive year-round, drawing rare critters like hairy frogfish and ornate ghost pipefish. Shore entry and calm conditions make it equally accessible to photographers on a single tank and technical divers exploring the deeper rubble zones.
Conditions
Depth
5 to 25 m
Open water and up
Current
Can be moderate
Can pick up on the edge
Visibility
8 to 18 m
Clearest in the calm season
Water
13 to 28°C
5mm wetsuit
Your chances of seeing each animal
Hairy FrogfishLeast concern
Sometimes
About 1 in 3 dives
Nudibranch (Flabellina)
Sometimes
About 1 in 3 dives
Moray Eel
Sometimes
About 1 in 3 dives
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