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Genkainada Sea Route

island ferryIki Islandarchaeologicalseafoodday trip

Saga · Karatsu

33.7500°N, 129.7100°E

Iki Island, accessible by ferry from Karatsu or Hakata, is a 138-square-km island in the Genkai Sea with exceptional archaeological significance (it was the center of the ancient Iki-koku kingdom described in 3rd-century Chinese records) and excellent coastal diving. Most importantly, it is reachable from Karatsu as a day trip, and offers an island pace, clear water, and extraordinary seafood at prices that reflect the absence of tourist infrastructure rather than any lack of quality.

Essential Information

Opening Hours

Ferry: departs Karatsu at 9:00 AM and 2:00 PM (seasonal) | Island facilities vary

Closed: Ferries may be cancelled in rough weather | Check seasonal schedule

Entrance Fee

Ferry: ¥2,540 each way | Harunotsuji archaeological park: free | Whisky distillery tasting: separate charge

Best Season

May–October for best sea conditions and full island access

Visit Duration

Full day (day trip) | Overnight stay recommended for full exploration

Getting There

Access Information

Ferry from Karatsu to Iki (Ashibe Port): 1 hour 5 minutes, ¥2,540 each way. Departs Karatsu at 9:00 and 14:00 (seasonal). Bicycle rental available on Iki. Day trip feasible; overnight preferable.

Insider Guide

Premium

**Island circuits:** Iki's 88km coastal road circuit by bicycle (full day, ¥1,500 rental) passes sea caves, Harunotsuji archaeological park (Japan's most complete Yayoi period site), and a whisky distillery (Iki Single Malt, using barley and Iki seawater) open for tasting. No roads have traffic lights on the island. **Iki urchin:** Iki produces what many seafood buyers consider Japan's finest sea urchin (uni) — the murasaki variety fed on Iki's dense kelp beds. Available fresh at Ashibe Port market; the difference from mainland supermarket uni is absolute.

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