Nii-jima is a volcanic Japanese island.
Niijima (新島, "new island") may also refer to: Places in Japan Niijima, Tokyo, a village in Ōshima Subprefecture, Tokyo Metropolis
Niijima (Ogasawara), a new volcanic island which emerged in 2013-2014 and joined with Nishinoshima
People with the surname Joseph Hardy Neesima (Jō Niijima; 1843–1890), Japanese evangelical missionary and founder of Doshisha University Haruo Niijima, a character in the manga and anime Shijō Saikyō no Deshi Kenichi Makoto Niijima, a character in the video game Persona 5 Sae Niijima, the older sister and legal guardian of Makoto Niijima