You can see fireflies in Shirakawa-go from late June to the end of July.
Although their numbers have been declining recently, likely due to climate change,
Last year, we were able to see many in the Gassho village.
This is a quiet time with relatively few tourists, so
on cooler nights, taking a walk to watch the fireflies is a recommended activity.

(Photo provided by Anno Etsuji https://www.instagram.com/shirakawa.go/)