In September 2025, norovirus food poisoning occurred at multiple restaurants in Aichi Prefecture and other prefectures, with the source traced to the same processing facility that produced grated daikon. No leftover product could be secured, and stool tests of workers were negative. The investigation into the cause and measures to prevent recurrence was reported.
Norovirus infections occurring in September 2025 were confirmed around the same time at multiple restaurants in Aichi Prefecture and in other prefectures. The investigation concluded that they were linked to grated daikon produced at a single processing facility, and that the product may have been supplied to restaurants.
Reports noted that no leftover product could be secured and that stool tests of workers were negative, and described the course of the investigation to identify the route of infection. The relevant local authorities pursued clues to determine the cause and took steps after identifying inadequate hygiene controls.
Following the investigation, guidance was provided to prevent recurrence, and stronger hygiene controls are being sought as a future measure. The article awaits additional information and further reports.