Amano River Fireflies
"A 10-minute walk from JR Omi-Nagaoka Station. ""Nagaoka's Genji fireflies and the area where they breed"" is the only firefly-related National Special Natural Monument in the country. A Firefly Festival is held here each year around early June, and during that time firefly-themed paper lanterns are placed along walking paths in the event area; visitors walking near the pure river will see a magical world created by the lights of countless Genji fireflies. The fireflies engage in three flying sessions a night and are most active from around 8 p.m. to 9 p.m."
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