Irohajima Family Inn in Karatsu

On a tree-lined property overlooking the Sea of Japan, this tranquil hot spring hotel with a beach is 3 km from both the Iroha Island Observation Deck and National Route 204.The straightforward rooms come with flat-screen TVs; some have shared bathrooms, sea views, and/or tatami floors, futons and chabudai dining tables. Upgraded rooms add en suite facilities.Breakfast and dinner are complimentary. There's also an airy restaurant. A gender-segregated communal bathhouse has soaking pools with geothermal water and panoramic sea views.