Key Facts
• August 1, 2025: Five redback spiders found in Kaga City, Ishikawa.
• Location: Niozen Service Area, Hokuriku Expressway (southbound).
• Discovery time: 4:20 PM by a service area employee.
• Spiders: Five female redback spiders and egg sacs identified.
• Action: Spiders were exterminated on-site by the employee.
• No injuries reported from the incident.
• Redback spider details: Females are venomous, 7-10 mm in size, black with red markings.
• Ishikawa Prefecture’s advice: Crush spiders or use household insecticides for extermination.
• Historical context: 15th redback spider case in Ishikawa; last found in Komatsu City, September 2024.
Summary
On August 1, 2025, five venomous redback spiders were discovered at the Niozen Service Area on the Hokuriku Expressway in Kaga City, Ishikawa Prefecture. The spiders, along with their egg sacs, were found by a service area employee and exterminated immediately. No injuries were reported. This marks the 15th recorded case of redback spiders in Ishikawa, with the last occurrence in September 2024 in Komatsu City. Redback spiders are invasive species, with females being venomous and identifiable by their black bodies and red markings. Authorities urge residents to crush the spiders or use household insecticides if encountered.
