Ishigaki Island (石垣島, Ishigaki-jima, Yaeyama: Ishanagï, Okinawan: Ishigachi), also known as Ishigakijima, is a Japanese island south-west of Okinawa Hontō and the second-largest island of the Yaeyama Island group, behind Iriomote Island. It is located approximately 411 km (255 mi) south-west of Okinawa Hontō.[1] It is within the City of Ishigaki in Okinawa Prefecture. The city functions as the business and transport center of the archipelago.