The small Ōkunoshima island in Japan is often also called Usagi Shima, which literally means “rabbit island.” It gets that name because it’s largely populated by rabbits. It is forbidden to hunt them and you’re not allowed to bring cats or dogs on the island. People guess that rabbits occupied the island when children released a few pet rabbits when the islands were evacuated in the 1940s, or that the rabbits are escaped test subjects from the island’s former toxic gas production labs, as there was a secret poison gas factory built on the island at the start of the 20th century.