Mercure Saga Karatsu Resort  

On the Hamasaki Coast in Karatsu, with the Matsuura River on one side and Karatsu Bay on the other. The resort sits about 2 km from Karatsu city center and roughly an hour from Fukuoka, near sandy beaches lined with pine groves.

Spacious rooms offer ocean or river views and are ideal for families. Rooms come with essentials like a shower, TV and slippers, and the property is accessible with elevators and family-friendly playrooms.

Treatments and downtime are on offer with a spa center, massage room, sauna and a large public bath plus an onsen lounge. There’s karaoke, table tennis, parking and free Wi‑Fi—perfect for wake-up-to-sea-breeze mornings and relaxed evenings; all-inclusive packages cover dinner, breakfast and lounge access.

A conference hall is available for meetings and events. Complimentary on-site Wi‑Fi keeps things connected.

On-site restaurant and bar serve local specialties and regional flavors, with lounge hours that include an evening social and a night cap. The all-inclusive plan features breakfast and dinner plus lounge drinks—think beer, wine, sparkling and even amazake after the bath.