Japan: Mayfly Swarm Blankets Bridges Over Kiso River, Creates Slippery Roads.

Ichinomiya, Japan - September 07, 2026 A massive swarm of mayflies has swept over bridges spanning the Kiso River between Aichi and Gifu prefectures, a recurring September phenomenon in the area. Footage shows the insects, drawn to lights, obscuring drivers' visibility, while their carcasses have piled up on the road surface, creating slippery conditions that motorcyclists have called dangerous. Experts say the swarm could persist for about a week and are urging drivers to slow down and keep windows closed. RESTRICTIONS AND USAGE TERMS: Please credit “@9Usw13b6acqiTvn via Spectee”. [NOTE: No audio] Video Location: Nobi Bridge between Ichinomiya, Aichi Prefecture and Hashima, Gifu Prefecture, Japan Video Recording Date/Time: September 7, 2026 at about 20:00h