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Kase River Firefly Festival — June Bioluminescence
The Kase River and its tributaries in the southern Saga mountains host one of Kyushu's most concentrated firefly populations — the combination of clean water, low agricultural chemical use, and dense riparian vegetation has maintained conditions for Genji-botaru (the large Japanese firefly) that have disappeared from most of Japan. The firefly season runs June 1–20, and the peak nights (June 8–12 in an average year) see thousands of simultaneous light signals over the river.
基本情報
営業時間
June evenings only | From dusk (approximately 7:30 PM) | Peak viewing: 8:30–9:30 PM
定休日: Outside June 1–20 | Rain reduces firefly activity
料金
Free
ベストシーズン
June 1–20 | Peak: June 8–12 (average year) | Check local reports for exact peak
滞在目安
1.5–2 hours (evening viewing)
アクセス
アクセス情報
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近くのスポット
Kase River Firefly Festival — June Bioluminescenceから直線距離で近い穴場スポットです。
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