[Tsushima islands] Population: 32,954 people, Area:708.66 km², Longitude and latitude: E129˚17 'N34˚12', The distance between Tsushima and Tokyo: 1,231.0km

Characteristic: Tsushima islands locate on near the republic of Korea (south Korea). Thus people lived in Tsushima has traded Japanese goods to East Asian countries from long time ago. There are many cultural heritages (national treasures) such as the Kaneda castle, the Kaneishi castle and the Banshoin temple. As for environment characteristics, numbers of species live in forest; the Tsushima cat (endangered species), the Tsushima’s endemic flora and fauna (protected by the Japanese government), etc.

[Iki islands] Population: 27,456 people, Area: 138.58 km², Longitude and latitude: E129˚42' N33˚45', The distance between Iki and Tokyo: 1164.8 km

Characteristic: Iki islands locate on between Tsushima islands and Nagasaki prefecture. Iki islands has also traded as same as Tsushima islands. There are lots of old mounds and the excavated articles (national treasures) such as the Sasazuka, the Souroku and the Haranotsuzi. The food culture such as the Iki shochu (Japanese sprits) and the Iki beef have been popular to tourists.

[Goto islands] Population: 37,867 people, Area:420.91 km², Longitude and latitude: E128˚51' N32˚42', The distance between Goto and Tokyo:1238.3 km

Characteristic: Goto islands have Catholic Churches registered as national treasure such as the Kasiraga island Catholic Churches, the Aosagaura Catholic Churches, and the Egamietc Catholic Churches. Now that there are civic actions that aim to register the Catholic Churches in the World Heritage List. The beautiful environment also attracts tourists; The Takahama beach is famous for having the one of most beautiful sandy.

[Hirado islands] Population:32,252 Area:235.66 km², Longitude and latitude: E129˚43' N33˚20', The distance between Hirado and Tokyo: 1234.1 km

Characteristic: Hirado islands locate nearest in Nagasaki prefecture, having remains intrading with the Netherlands long time ago. Thus, Hirado-shokan is registered as a national treasure for the Netherlands trade. The Tabira church and Houki church (built with bricks) are also important cultural heritages.

[Saikai islands] Population:33,680 Area: 241.94 km² Longitude and latitude: E129˚38' N 32˚55', he distance between Saikai and Tokyo:1225.1 km

Characteristic: Saikai islands are constructed by lots of islands called as the Kuzyukushima islands. The region has a zoo and an aquarium for tourists. The beautiful ocean and islands views are famous tourism sites. The Hashima (alias, Gunkann-zima; it looks like a war ship) is now under the registration in the World heritage list.