What is their purpose in doing so?
If you have ever taken a stroll through the tranquil residential streets of Japan, you may have observed clear plastic water bottles arranged neatly near fences, walls, or gardens. While they might appear to be discarded waste, these bottles are actually placed there intentionally as nekoyoke, or cat deterrents. This intriguing practice is frequently seen in numerous Japanese neighborhoods.
Despite the nation’s affection for cats, stray felines can create issues by transmitting diseases or causing damage to property. To mitigate this, some residents position water-filled bottles outside their homes and gardens in an attempt to dissuade cats from entering or marking their territory in those locations.
The rationale behind this practice is that the sunlight or artificial light reflecting through the water produces flashes that startle or confuse cats. Others believe that the distorted reflections or the alteration in depth perception caused by the water may disorient the animals, leading them to avoid the area entirely.
Interestingly, this custom did not originate in Japan. It is thought to have begun in the West during the 1980s as a strategy to repel dogs. Over time, Japan embraced and modified the concept to deter cats instead, particularly in residential areas where green spaces or gardens might attract strays.
However, the efficacy of this method is debatable. Animal behavior specialists generally concur that water bottles do not consistently prevent cats from entering a space, especially in low-light conditions where light reflections are scarce. Nonetheless, the practice continues—motivated by tradition, habit, and perhaps a touch of optimistic thinking.
Although the method has not been scientifically validated as effective, it continues to be a safe and non-invasive approach for residents seeking to safeguard their environments. Over time, it has evolved into more of a cultural curiosity rather than a pest control strategy, embodying values like resourcefulness and discreet problem-solving. Regardless of its efficacy, the presence of these water bottles brings a touch of intrigue and gentle charm to the streets of Japan, creating a memorable experience for both locals and tourists.