In the 1930s and 1940s, Okunoshima Island was the site of a Japanese poison gas factory. At the end of WWII, the employees, their families, and their pets returned to the mainland, leaving the island uninhabited.
Some years later, someone—no one is sure who—released a few rabbits on the island. With no predators and a good food supply, the rabbits multiplied like t/k (Ed: Sorry. I’m trying to come up with a good simile here, but I’ve drawn a blank. Maybe I’ll think of something later.)
Today, Okunoshima is better known as Rabbit Island. Its fearless and friendly rabbits have made it a tourist spot, for reasons that are obvious in the video.
Here’s the story about Rabbit Island from the BBC: