Best time of year to avoid bears in Japan?
I'm flexible on when to visit Japan and want to minimize bear encounters. I know bears hibernate in winter, but I've read some bears aren't hibernating anymore due to warm weather.
- Which months have the fewest incidents?
- Is winter truly safe, or have winter sightings increased?
- Spring vs autumn, which is lower risk?
- Does the safe month differ by region?
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Kumamap has 116,565 incidents with timestamps. Monthly breakdown:
- February: 818 (lowest)
- March: 790
- April: 2,580
- May: 8,060
- June: 14,399
- July: 14,263
- August: 10,812
- September: 10,971
- October: 26,277 (highest, 4x any other month)
- November: 16,561
- December: 3,571
- January: 7,471
Feb-Mar is the safest window. Combined: 1,608 out of 116,565 (about 1.4%).
October is the most dangerous by far. Bears enter hyperphagia before hibernation. October 2025 alone saw 88 attacks and 7 deaths.
Spring (Apr-May) has about 10,640 incidents. Autumn (Sep-Nov) has about 53,809. Autumn is 5x more dangerous.
Winter is no longer guaranteed safe. In December 2025, a bear chased a snowboarder at Hakuba47 in Nagano. January still logged 7,471 incidents. Warm winters keep some bears active.
By region: Hokkaido brown bears hibernate later (mid-Dec) and emerge earlier (mid-Mar). Tohoku black bears peak Oct-Nov, worse in acorn failure years.
Recommendation: February-April for bear-minimal hiking.
Seasonal analysis: kumamap.com/en/blog/bears-not-hibernating-2025