Tourism Spots · Yamanashi
Lake Sai Black Bear Incidents
Bear incident and sighting reports for Lake Sai, compiled from official government sources, news outlets, and community submissions. View the interactive incident map and safety information before hiking or outdoor activities.
Lake Sai’s most recent report came on May 8, 2026 at 01:35 in Kōfu Nakabatakecho, where a truck driver on National Route 358 saw a bear like animal about 1 m long on the road in Nakaba cho, Kōfu City. Another sighting followed on May 5, 2026 near Fujikawaguchiko Saikonishi, close to the Kagikake Pass trailhead, where a bear like animal was seen while descending from the pass.
The strongest bear activity around Lake Sai has been in Fujikawaguchiko, especially in Kawaguchi, Oishi, and Fujigane, with more reports also coming from Kōfu and Oshino Village. The pace peaked in November 2025 with 42 incidents, stayed high in June 2025 with 35, and then eased through December 2025 with 14 and February 2026 with 1; this area has logged 469 black bear sightings in total.
Lake Sai Bear Incident Map
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Frequently Asked Questions About Bears in Lake Sai
How many bear incidents have been recorded in Lake Sai?
Lake Sai has recorded 469 bear incidents in total, with 2 reported in the last 30 days and 2 in the last 7 days. These reports are compiled from official government sources, news outlets, and community submissions, and can be viewed on the incident map.
When and where was the latest bear incident in Lake Sai?
The most recent bear sighting in Lake Sai was on May 7, 2026 in Kōfu Nakabatakecho, Yamanashi, where 1 Black Bear was reported. Detailed location and surrounding incidents are available on the incident map.
Where have bears appeared recently in Lake Sai?
Recent bear sightings in Lake Sai have been concentrated in Fujikawaguchiko Funatsu (12), Fujikawaguchiko Kawaguchi (8), Fujikawaguchiko (8). These areas have had multiple reports within the last 30 days.
Is bear activity increasing in Lake Sai?
Activity is elevated. 2 of the 2 monthly incidents occurred in the last 7 days.
What type of bears are in Lake Sai?
Lake Sai is home to Asian black bears, which weigh up to 120kg and inhabit the mountains of Honshu and Shikoku. They are generally shy but can be dangerous when surprised or protecting cubs. Carry bear bells while hiking.