Why Are Water Bottles Lined Up Along Streets in Japan?

If you’ve ever strolled through Japanese neighborhoods, you may have noticed clear water bottles placed along fences, walls,

or near gardens. While they may seem random or forgotten, these bottles—called “nekoyoke”—are intentionally set out to deter stray cats.

Despite Japan’s love for cats, stray ones can pose problems, from spreading disease to damaging property.

To prevent them from entering yards or homes, some residents place these bottles in strategic spots. The idea isn’t originally

Japanese—it began in the West in the 1980s as a way to keep dogs off lawns. Japan adapted it for cats, since stray dogs are rare there.

How it supposedly works is based on theories: light reflecting off the water may startle cats, or

distorted reflections might confuse them. Some believe it affects cats’ depth perception. However,

none of these ideas are scientifically confirmed, and studies show little evidence the method is effective.

Still, the practice continues—not out of proven success, but tradition. It’s a harmless habit, blending superstition,

aesthetics, and a hopeful “better safe than sorry” mindset. Whether effective or not, it adds a charming,

curious touch to Japan’s streets and speaks to the country’s creative, peaceful problem-solving culture.