Things to do · Destination Guide
Columnar rock, cold-water marine life and coastal days from Horomui and Bikuni.
Pick an activity mode to compare signature sites, skill fit, and gear planning notes before you lock your trip.
Aqua Cat in Horomui and DIVE-BiDS in Bikuni provide concrete local scuba options, while Grande Polpo offers a Sapporo-based route to the peninsula. The main format is guided boat diving, with introductory programs separate from certified fun dives. Winter activity must be arranged with an operator offering it; the tourism listing for DIVE-BiDS gives an April-November business season. S04 S12 S13 S09
Hasegawa no Shima
A sand-bottom training and introductory site in Aqua Cat's Horomui portfolio.
Maehama
Columnar bedrock used for introductory and night-diving itineraries.
Makka Cape
A route around columnar rock formations; the operator chooses the usable passage and depth.
Canyon
Columnar formations rising from sand, reached by local boat.
Gunkan no Kakurene East and West
Outer submerged rocks with explicit strong-current warnings and higher experience requirements.
Operator Checklist
Send your certification and recent log before booking. Ask about cylinder valve compatibility, available breathing gas, drysuit size and cold-water regulators; no nitrox or technical-gas supply was independently verified. Sapporo Diving Service requires certification for fun dives and has a refresh option, which may be useful before an unfamiliar cold-water trip. Do not infer cave, cavern or wreck-penetration support from a scenic place name. S11 S48
Conditions Fallback
Avoid