Unprecedented Cockroach Invasion Sparks Panic and Pest Control Surge in Northern Japan
Japan's northern island of Hokkaido is facing an unprecedented cockroach invasion fueled by global warming and e-commerce deliveries. Sales of pest control products in Sapporo surged by 107%, shattering the region's pest-free reputation.
Residents of Hokkaido, Japan's northernmost island, which has long prided itself on a cold climate virtually free of cockroaches, are now facing an unprecedented invasion of the pests. The phenomenon has sparked panic among the local population, who are unaccustomed to the insects, leading to a sharp surge in demand for pest control services and insecticides.
Rising Numbers in Sapporo
Field data highlights the scale of the infestation. A pest control company in Sapporo, the island's capital, reported nearly 50 service calls since the beginning of the year. A competitor noted that the number of treated cases more than doubled within two years — from about 50 cases in 2021 to over 100 last year, according to a report by the Taiwan-based China Times. Concurrently, home improvement stores in Sapporo reported a 107% spike in sales of anti-cockroach products.
Hiroshi Nishino, a senior lecturer at Hokkaido University, explained the situation in an interview with the Bangkok Post:
"Their numbers are certainly lower compared to the main island of Honshu. They remained under the radar because most of them are nocturnal. However, the perception that this region is immune is now being shattered."
Invasive Species and Modern Homes
According to Asian media reports, three main species are currently invading the island:
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Japanese cockroach: A species highly resilient to extreme cold conditions.
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Smokybrown cockroach: Active mainly during the warmer seasons.
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German cockroach: The common and well-known species that reproduces rapidly indoors.
Experts point to four primary factors accelerating the spread of the pests: global warming, the expansion of e-commerce and home deliveries, the availability of food and water, and advanced heating and insulation systems in modern homes. According to a report by Sing Tao Daily, the well-insulated housing in Sapporo provides a warm and stable environment for the insects during the winter, allowing them to survive and reproduce year-round.
Infestation via Cardboard Boxes
Another major pathway of spread worrying experts is postal deliveries. Entomologists warn that packages and cardboard boxes arriving from southern regions of Japan often carry cockroach eggs, introducing new populations directly into residents' homes.
In response to the situation, a leading Japanese pest control brand reported a steady annual sales increase of approximately 6% on the island since 2017. Authorities and exterminators are now urging residents to seal cracks in doors and windows, emphasizing that the long-held belief in Hokkaido as a cockroach-free sanctuary officially belongs to the past.
