Fly to Yonaguni Airport (OGN) on a Ryukyu Air Commuter/JAL Group domestic service from Ishigaki (ISG) or Naha (OKA); the town tourism association's March 2026 snapshot describes multiple daily services, but flight numbers and frequencies must be rechecked for travel dates in JAL schedules. The island is not an international arrival port for visitors transferring directly from another country.

The alternative is Fukuyama Kaiun's ferry between Ishigaki and Kubura Port. The current operator lists roughly 4 hours each way, twice weekly; weather and an annual summer docking suspension can intervene. Fly or ferry in with a full weather buffer if diving is your core purpose. Ferry operator. Ferry update checked November 4, 2026: the operator currently warns of arrivals about 40 minutes later than the normal four-hour crossing, approximately 14:40 at Yonaguni and 13:40 at Ishigaki; departure times are unchanged and the recovery date is unannounced. Its November event schedule also moves sailings to Ishigaki outbound November 13 and Yonaguni return November 15, with surrounding dates changed. Check the actual dated calendar rather than applying the normal weekdays to every November trip. .

The sole airport on Yonaguni; domestic RAC/JAL Group service is published from Ishigaki and Naha. Confirm date-specific availability. Town guide; JAL.

The free public community bus links Sonai, Kubura and Hikawa under an April 2026 revised timetable but does not reach Agarizaki. Rental vehicles, scooters and cycles are limited; book early and check whether a foreign driving license is legally valid in Japan. Taxis are few. Sou-Wes' current Japanese sightseeing-boat page says it is not currently providing transfers, while dive operators vary, so never assume an airport or hotel pickup. Town tourism transport; Boat operator.

Yonaguni follows Japan's national entry regime. International travelers must satisfy Japanese passport, visa or short-term visa-exemption rules for their nationality and arrival purpose, then take domestic transport to the island; there is no separate Yonaguni visitor visa. Visa waivers have nationality-specific conditions. Check the Japanese Ministry of Foreign Affairs before departure. Commercial dive operators may require a recognized certification card, recent logged experience, medical statement and emergency contact, independent of immigration rules. Operator rules.

Carry dive certification, recent log details, dive computer and an SMB. YDS requires a surface-marker float and mesh kit bag for boat equipment, with some rentals available; Sou-Wes and La Mer Bleue have different rental and booking policies. Recheck tank gas, weights, exposure suit and optional nitrox rather than assuming availability. Travel with critical mask, corrective lenses, medications and spares because on-island replacement stock is limited. Schedule the last dive with DAN-recommended no-fly intervals and a buffer for weather disruptions. YDS equipment; DAN.

Pay in Japanese yen. Some operators, such as YDS, accept credit cards, but the ferry requires cash at the port for foot passengers and local small businesses may be cash-focused. Carry a sensible reserve before arrival. YDS payment terms; Ferry payment policy.

Japan Post confirms ATMs at Sonai's Yonaguni Post Office and Kubura Post Office. Sonai has limited daily opening and Kubura closes on weekends, so do not assume after-hours cash access or universal foreign-card compatibility. Sonai ATM; Kubura ATM.

Okinawa uses Japanese two-flat-pin Type A outlets, 100V and 60Hz. Check chargers and bring an adapter if necessary. Okinawa travel FAQ.

Communications

Japanese is the default for many small services; Sou-Wes maintains an English web page but that does not guarantee English-guided departures on any date. Verify language and emergency-call assistance directly. Mobile connectivity and guesthouse Wi-Fi should be checked with specific suppliers; do not assume continuous coverage along exposed capes or offshore. Download maps and operator instructions before arrival. English service page; Tourism contacts.

Language

Japanese is used for formal schedules, safety notices and many guide briefings; local Yonaguni cultural language and traditions persist. When contacting a dive shop, state certification level, recent dives, expected sites, language needs and emergency/medical information in advance. English written materials exist for some operators but cannot establish the spoken guide language for every trip. First-party terms.

Insurance

Choose travel and diving insurance that explicitly covers planned recreational scuba conditions, drift dives within certification, emergency evacuation from remote islands, decompression treatment, trip interruption and equipment. Clarify exclusions for overhead or technical dives, freediving and bad-weather boat cancellations. Operator-included accident cover may not replace independent coverage. A routine clinic is on the island, but no local hyperbaric availability was verified. Operator inclusion; Medical site.

Packing list

Bring certification card and electronic dive log, SMB, dive computer, travel medicine, prescription medicines, a warm layer for winter boat wind, 3mm-5mm exposure options as appropriate to personal tolerance, sun protection, sturdy shoes and dry-bags. Take enough Japanese cash for the ferry and island purchases; carry regular necessities because replacement supplies are limited and weather can interrupt deliveries. Pack conservative flight-day scheduling and flexible land activities into the itinerary. Boat gear requirements; Sea conditions.

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