Kadowasa River Fireflies

"About a 30-minute drive from Gero Onsen, this area on the Kadowasa River that originates in Gero City's Kadowasa is home to a kind of firefly called ""genji-botaru."" It's a good habitat for them as the river has lots of black snails that the fireflies feed on, slow flowing water, and little pesticide pollution throughout the river basin. In 1969 the area was designated a Natural Monument by Gifu Prefecture. The best spot to see them is the roughly four-kilometer stretch between the Hiuchi and Wasa districts. You can see the fireflies in all their faint flashing glory from mid-June through July."