izudiving.com · Operator Blog
Black-tide offshore expedition, advanced-diver positioning and limited-seats context.
Dive Spot Guide•
Zenisu
Zenisu: remote charter drift reef for advanced divers.
Only reachable by charter boat, Zenisu is a long-transit offshore drift site with free descent/free ascent and heavy pelagic life.
About Zenisu
Zenisu is a remote offshore reef group in the Izu Seven Islands, reachable only by charter boat from places such as Jinzu, Shimoda or Nishi-Izu. The site is an open-ocean drift dive with free descent and free ascent, so it suits experienced divers who want a big-water day rather than an easy local reef. It is best known for dense fish schools and pelagic action, with sharks, green turtles and occasional whales part of the draw.
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Research Estimate At Zenisu
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 24m
AccessDifficult access
Aquatic LifeExceptional variety
FacilitiesLimited facilities
Crowd / PopularityVery quiet
CurrentVery strong current
Where Is Zenisu?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Zenisu Planning Details
Depth range, seasonality, and planning context.
Reported Depth
20m - 25m
Depth Note
Many points are around 20-25m, with an immediate drift entry rather than a shallow bay profile.
Best Season
August to September.
Typical Conditions
Immediate drift diving with free descent/free ascent; visibility around 24m and points commonly in the 20-25m range.
Safety & Access At Zenisu
Hazards, restrictions, and access requirements.
Key Hazards
Restricted accessStrong current
Safety Notes
This is an advanced offshore site with long transit times, free-entry drift dives and potential black-tide conditions; only go with a charter team that can manage blue-water logistics.
Access Restrictions
Can only be reached by charter boat; travel times are long from common departure points.
Legal Notes
Seasonal charter departures only; confirm the departure window and sea-state call with the operator before booking.
Local Intel For Zenisu
Community notes to help plan your visit.
Scuba Diving
Advanced open-ocean drift scuba with free descent and free ascent; no descent line or easy shore-style entry.
Freediving
Not a freedive target; the site is built around advanced drift scuba and long offshore logistics.
Snorkeling
Not a casual snorkel site; the open-water drift and boat logistics make it a poor fit for surface-only plans.
Wildlife at Zenisu
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Zenisu
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Zenisu
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility24m
Activity
No dive activity logged yet.
