The whole area is designated as part of Saikai National Park.
[1] The two biggest islands, Kuro-shima and Taka-shima, are easily accessible by ferry from the harbour of Ainoura in the north of Sasebo three times a day.
[3] There are some well-preserved old houses on the island showing the traditional architecture.
There are a few paddy fields on Kuro-shima as well, some of them are terraces which are very rare in Japan.
In the middle of the island, there is a school, an administration building and a shop.