Although traditionally referred to as the "Izu Seven" (伊豆七島, Izu Shichitō), there are in fact more than a dozen islands and islets.
Nors dažnai vadinamas „Izu septynetu“ (伊豆七島 Izu Shichitō), salynas sudarytas iš daugiau nei tuzino salų ir salelių.