There are several moorage options on Iki, the best is at Gonoura on the southern end of the island (33. °44.8604’N, 129°40.7265’E). It’s well protected, except for weather from the south. There are three large visitor-only concrete pontoons in a man-made basin to the west of town, it’s a bit shallow at the inner-most pontoon, so that’s reserved for powerboats (and occasionally catamarans).
Boats up to about 20 meters (65′) can be accommodated, with the moorage charge set at ¥20 ($0.20)/meter + 10% tax (so less than $9/night for a 40′ boat!).
No water or power on the pontoons. There is a washroom nearby, with an onsen hot-spring bath available at the View Hotel Iki a 10-minute walk away. Shops and restaurants are a 15-20-minute walk away. The island is quite large and hilly so exploring by bicycle is not recommended, but there are a few rental car companies in Gonoura.
To reserve a moorage spot at Gonoura, call City Hall at 0920-44-6114. If calling on the weekend or if you can’t speak Japanese, you can also call Mr. Hayashida, manager of the facility at 090-1979-2578.
To find out more, see here.
Information provided by Kirk Patterson of Konpira Consulting.