Mitsu-ishi
Also known as: Three Rocks
Best time to dive
September
What you might see
- NudibranchLikely
Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.
Certification & difficulty
Open Water - advanced conditions (currents/depth); dive within your training.
Snorkelling
Snorkel-friendly - Yes - this is primarily a snorkeling and tide-pool (iso-asobi) destination, popular with families; large tide pools of varying size form at low/spring tide
Safety notes
Slippery, uneven volcanic rock underfoot; open-ocean swell/current exposure at the outer rocks; supervise children closely; the Umeboshi/Sango anemone population here is a designated natural monument so collection is prohibited
Permits & fees
No dive-specific permit found for Mitsu-ishi itself (public shore access); collecting marine life, especially the natural-monument-designated anemones, is prohibited under cultural property protection; standard Manazuru-area fishing-rights etiquette applies if diving/foraging elsewhere on the peninsula
Permits and operators change - confirm before booking.
Location
Nearest hub: Manazuru
This profile is desk research, compiled from public sources - not a first-hand dive report. Coordinates are approximate.