Wooden racks line the shore, heavy with silvered fish drying in the salt air. A cat watches from the shadow of a stone wall, waiting for scraps — or perhaps for a rat foolish enough to approach the catch. This scene played out on dozens of Japanese islands for centuries, and it explains everything about how cats came to rule these places.
Fishing and Cats
Most cat islands were originally fishing communities. Fishermen valued cats for practical reasons: they kept mice and rats away from fish-drying operations. On islands where the fishing catch was the primary source of income, protecting it from rodents was serious business. Cats weren't pets — they were working animals with a critical economic function, tolerated and eventually revered because livelihoods depended on them.
Over time, superstition grew around the cats. On Tashirojima, fishermen began to believe that cats could predict weather and fish movements. A cat shrine was built, and intentionally harming a cat became taboo.
The Silkworm Connection
On some islands, cats were introduced to protect silkworm cultivation from mice. When the silk industry declined, the cats remained. Without natural predators on these small islands and with consistent food sources (fishing scraps), cat populations grew.
Depopulation and Growth
The real explosion in cat populations came with Japan's rural depopulation. As young people left islands for mainland cities through the 1960s-2000s, human populations plummeted. With fewer people but continued food sources, cats thrived.
Aoshima is the starkest example: the human population dropped from hundreds to fewer than 10, while cats numbered over 100.
Modern Management
Today, most cat islands have TNR (Trap-Neuter-Return) programs managed by volunteer organizations. These programs aim to stabilize populations while maintaining the cats' quality of life. On some islands, local governments and NPOs collaborate on veterinary care, feeding programs, and adoption campaigns.
Tourism's Role
Cat island tourism is a double-edged sword. It brings economic activity to struggling communities but also introduces challenges: garbage, cat feeding issues, and disturbance to elderly residents. Responsible tourism — bringing cat food, taking garbage home, respecting residents — is essential.
These islands tell a larger story about rural Japan's decline — but when the last human resident eventually leaves, will the cats still be there?