Okinotorishima, or Parece Vela, is a coral reef, geologically an atoll, with two rocks enlarged with tetrapod-cement structures. It is administered by Japan with a total shoal area of 8,482 m² and land area 9.44 m². Its dry land area is mostly made up by three concrete encasings and there is a 100 by 50 m stilt platform in the lagoon housing a research station. T…Okinotorishima, or Parece Vela, is a coral reef, geologically an atoll, with two rocks enlarged with tetrapod-cement structures. It is administered by Japan with a total shoal area of 8,482 m² and land area 9.44 m². Its dry land area is mostly made up by three concrete encasings and there is a 100 by 50 m stilt platform in the lagoon housing a research station. There is a third completely artificial tetrapod-cement islet.