Official Tourism Website of Mount Fuji in Yamanashi Prefecture "Home of Mt.Fuji, Yamanashi" > Minobu Firefly Festival (June 9, early-late June)
Main content starts here.
Being surrounded by trees, mountains, and a great abundance of nature, Minobu Town is a great place to view fireflies at night. From early June to late June, one can view the fireflies at night, but on June 9th is the main event day with many festivities!
Date: early~late June, main festivities are on June 9th
Time: 6:30 pm~9:00 pm
Place: Isshiki Kouminkan, Isshiki, Minobu Town (except for June 9th, there will be a 200 yen parking fee)
Events: Rock band performance, food stalls and local product stands, song performances, and more!
For more information and a map:
http://www.town.minobu.lg.jp/kanko/event_cal.php?id=2647( External link )