After the area - Kushichi

…Okinawa Prefecture, located northwest of Okinawa Island (the main island), consists of seven islands, including Iheya Island, Izena Island, Noho Island, and Gushikawa Island. They are commonly called the Seven Iheya Islands, and Izena Island was also called the front land and Iheya Island was called the back land. They belong to the middle belt of the Ryukyu Arc, and are made up of Paleozoic strata, but the topography is very varied. …

*Some of the terminology that refers to "Kochi" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…沖縄県，沖縄島(本島)の北西に位置し，伊平屋島，伊是名島を主体とし，野甫島，具志川島など7個の島よりなる諸島。俗に〈伊平屋の七離れ〉と称し，また伊是名島を前地，伊平屋島を後地（くしち）とも呼んだ。琉球弧の中帯に属し，古生層よりなるが，地形は変化に富む。…

※「後地」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報