The Kumejima Ocean Jet (KOJ) launches May 1, 2026, connecting Naha to Kumejima in approximately 82 minutes in summer (April–November) and ~101 minutes in winter (December–March) via jetfoil “Tsumugi” (230 passengers). One-way fare: ¥7,800. Book at ko-jet.com. Jetfoils produce minimal wave motion, so seasickness is rare. Luggage rules are similar to aircraft. Pets and bicycle policies to be confirmed.
General
Q: What is the Kumejima Ocean Jet?
A: A high-speed jetfoil service launching May 1, 2026, connecting Naha (Tomari Wharf) to Kumejima (Kaneshiro Port) in approximately 82 minutes. The vessel “Tsumugi” is a Boeing 929 hydrofoil with 230 seats.
Q: How fast is the jetfoil?
A: The jetfoil travels at approximately 80 km/h. It lifts above the water on underwater wings, providing a remarkably smooth ride.
Fares & Booking
Q: How much does it cost?
A: ¥7,800 one-way for adults (Naha–Kumejima). See our fare guide for details.
Q: How do I book?
A: Online at ko-jet.com or at the Tomari Wharf ticket counter. See our booking guide.
Comfort & Safety
Q: Will I get seasick?
A: Jetfoils ride above the waves on hydrofoils, producing far less motion than conventional ferries. Seasickness is uncommon. See our seasickness guide.
Q: What about luggage?
A: Carry-on bags fit under seats or in overhead compartments. Large suitcases go in the onboard luggage area. See our luggage guide.
Q: What if the sailing is canceled?
A: Cancellations due to weather result in a full refund. Alternative transport includes RAC flights and Kumeshosen ferry. See our cancellation guide.
