Goto Islands to Host Firefly Festival from May 23, 2026, Featuring Japan's Fastest-Flashing Endemic Species
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Shinkamigoto Town in Nagasaki Prefecture will host the "Aiko River Firefly Village Festival" from May 23 to June 7, 2026. At the Aiko River venue, visitors can simultaneously observe two types of fireflies: the "Goto Islands type Genji firefly," which flashes at a rate of once per second—the fastest in Japan—and the forest-dwelling Hime firefly. Viewing is free, and a parking area will be available. This unique firefly is a rare species found only in the Goto Islands, with its distinct characteristics identified through research by Nagasaki University.