Shima-umi
Izanagi-no-mikoto and Izanami-no-mikoto first gave birth to Awaji-no-sawake-no-shima.
The next island the two god gave birth, Iyo-no-futana-no-shima has 4 faces. Each of it's face has a name, Iyo-no-kuni is Ehime, Sanuki-no-kuni is Īyorihiko, Awa-no-kuni is Ōgetsuhime, and Tosa-no-kuni is Takeyoriwake.
Then they gave birth to Oki-no-mitsugo-no-shima, also called Amenōshikorowake, and then to Tsukushi-no-shima. Tsukushi-no-shima also has 4 faces, and each of them have names. Tsukushi-no-kuni is Shirahiwake, Toyo-no-kuni is Torohiwake, Hi-no-kuni is Takehimukahitoyokujihinewake and, Kumaso-no-kuni is Takehiwake.
Next, the two gave birth to Iki-no-shima, also called Amehitotsuhashira, Tsu-shima, also called Amenosadeyorihime, Sado-no-shima and Ōyamato-toyoakitsu-shima, also called Amemisoratoyoakitsunewake. These 8 islands are called "Ōyashima-no-kuni".
The two gods gave birth to another 6 islands, Kibi-no-kojima, also called Takehikatawake, Azukijima, also called Ōnodehime, Ōshima, also called Ōtamaruwake, Himejima, also called Amehitotsune, Chika-no-shima, also called Amenōshio, Futago-no-shima, also called Amenofutaya.