島とう外がいとうがいMeanings1noun, noun which may take the genitive case particle 'no'outside the island; off-islandRefers to areas, people, or things outside a particular island, often contrasted with 島内 (within the island).See also: 島内 (とうない)島とう外がいからの観かん光こう客きゃくが増ふえている。