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The map of Four Islands Archipelago as seen in Episode 1 of the anime.

The Four Islands Archipelago is comprised of four larger islands known as Fukurujima, Kunashima, Kasamajima, and Kamidoorijima. In addition, there are around 30 smaller islands crowded in the area. While there used to be many unoccupied islands in the past, the advent of anti-gravity shoes has allowed flight in the sky, effectively increasing the number of inhabitants as a result.


  • Kunashima
  • Fukurujima
  • Kasamajima
  • Kamidoormaijima