In the early 1970s, schoolchildren released rabbits on an abandoned Japanese island; 50 years later, DNA suggested other people had repeatedly left unwanted pets there

Okunoshima island carries a dual history of secret poison gas production and a thriving rabbit population. The island’s current rabbits are European domestic animals, not descendants of wartime experiments. Genetic research suggests multiple introductions of rabbits over time, not a single release event. Tourism has transformed the island into a popular destination, with rabbits relying on visitor food. This dependency creates ecological stress and impacts other wildlife on Okunoshima.
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