Chiraumi onsen (もとぶ温泉「美ら海の湯」) is located at Hotel Orion Motobu hotel and resort, the onsen water is pumped and heated from 1,400 metres underground. Entrance fees applies for both hotel guests and day trip. When we visited in early July 2023, bathing fee is 1,650yen for hotel guest and 2,150yen for day trip.
Long opening hour from 6-10am and 3pm to late night.
Water is chloride spring, to be precise Sodium-chloride strong salt hot spring (hypertonic neutral low hot spring). ナトリウム－塩化物強塩温泉（高張性中性低温泉）
At women’s side there is a spacious dressing area with locker and hair dryer as well as complete face wash, lotion, and milk. Also uniquely there is body lotion, hair tonic, and aftershave lotion as well, but no comb.
As for the pool, one indoor pool. Outdoor area there is a hot pool and cold pool (around 19 degrees) as well as dry sauna. The sun was shining through part of pool suitable for tanning. The view is amazing, overlooking emerald beach and Ie island.
There are three large massage chairs outside the bathing area with amazing moves.
