Karatsu Castle — Sea Castle on the Bay
Karatsu Castle (1608) stands on a pine-covered promontory directly above the mouth of the Matsuura River, with three sides facing the sea — one of Japan's few castle sites where the ocean dominates the view from every window. The reconstructed donjon (1966) contains a well-curated collection of artifacts from the Karatsu Kunchi festival, including the 14 festival floats (hikiyama) that parade through town annually in early November. The floats — representing mythological creatures and Chinese scenes — are works of lacquer craft that have been maintained and repainted for 200 years.
Essential Information
Opening Hours
9:00 AM – 5:00 PM
Closed: Open year-round (check for maintenance closures)
Entrance Fee
¥500
Best Season
Year-round | November 2–4 for Karatsu Kunchi Festival | Late March–April for cherry blossoms
Visit Duration
1–1.5 hours
Getting There
Access Information
Insider Guide
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