Akita Prefecture has adopted environmental DNA surveys that estimate whether bears passed within 1km upstream in the past 24 hours from a single glass of river water. We explain how it works, its limits, and how it compares with grizzly-detection efforts abroad.
In April 2026, all six Tohoku prefectures issued their earliest-ever bear alerts. A fatal attack in Iwate, Aomori's first urban emergency hunting in Hachinohe. Meanwhile, Shirakawa-go deployed 10 'Bear Sonic' units emitting a chalkboard-scratching sound. In Toyama, sightings dropped to zero for a year after installation. Can this Japanese acoustic technology save the day?