Gifu · Chubu
板屋川のホタル is a stretch of the small Itayagawa river in Gifu City's Saigo district, where Genji fireflies typically begin appearing from late May and dance in numbers through their June peak — best viewed 8-9pm. The local Saigo Firefly Festival (西郷ほたるまつり) runs on weekends through the season, organised out of the Saigo Community Centre.
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In the Saigo district of Gifu City, near Hachiooji Bridge on the Itayagawa; about 10 minutes from Gifu Interchange via the Tokai-Kanjo Expressway.
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