Checked a while agoWe last checked the official sources for this route on 2026-10-11. Prices and rules may have changed since: check the official page before you rely on it.
How oftenWeekdays only: 2 a day each wayDetails below
CrossingNii – Nagaitaura about 1 h 20–30 min
Adult fare¥970Adult, one way, Nii – Nagaitaura
Bookingnot confirmed
Straight lines between the ports, not the real course. Port positions from OpenStreetMap.
Boats P
Boat
How often
Crossing
Passenger boat
Weekdays only (no boats on Saturdays, Sundays and holidays): 2 a day each way — from Nii 7:00 and 14:40 (14:30 on Tue/Thu), from Nagaitaura 13:00 and 15:55. The 14:40 from Nii and some Tue/Thu boats skip several stops. Saga is not served at present.
Nii – Nagaitaura about 1 h 20–30 min (direct afternoon boat about 50 min)
Fares P
Adult, one way, Nii – Nagaitaura
¥970
Child, one way, Nii – Nagaitaura
¥490
Adult, one way, Nii – Umugi
¥170
One way, as published by the operator; fuel surcharges and seasonal fares may apply.
Tickets and booking P
Booking: not confirmed.
Where to buy tickets: not confirmed. Ask at the port.
No calls at Saga port until its damaged floating pier is repaired.
Between scheduled runs (Mon–Fri 9:00–12:00) the boat also offers Asō Bay sightseeing trips from Tarugahama, chartered or shared (shared trips run when 5 adults gather).
English names are the operator's own where it publishes them, otherwise romanised for this guide. Boats are often cancelled or changed in bad weather: check the operator's page on the day.