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    • Hotel Sonia Otaru
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      Hot spring

      A hotel with a natural hot spring large public bath that opened on December 27, 2018

      Our natural hot spring baths on the top floor will wash away all the weariness of your travels.

      Hot spring outline

      Opening hours:

      3:00 pm – 12:00 am
      6:00–10:00 am

      Hot spring

      Otaru-Unga-no-Yu (Otaru Canal Baths): Observatory bath
      * Spring water is 36.8°C, and is cooled/heated by adding cold water or applying heat. (Circulatory large bathtubs)

      Spring water quality

      Sodium-chloride, sulfuric acid salt source (slightly alkalized hypotonic hot spring); former spring water quality designation: Salt spring with sulfate content

      Conditions that are ameliorated by (bathing in) recuperation springs (general):

      Chronic pain or stiffening in the muscles or joints (the chronic phases of such conditions as rheumatoid arthritis, osteoarthritis, lower back pain, neuralgia, frozen shoulder, bruising or sprains), stiffening of muscles due to motor paralysis, decrease in gastrointestinal functions (indigestion, gassiness, etc.), mild high blood pressure, impaired glucose tolerance (diabetes mellitus), mild hypercholesterolemia, mild asthma or pulmonary emphysema, autonomic instability, hemorrhoids, various stress symptoms (sleeping disorders, depression, etc.), recovery from illness or fatigue, working to improve one’s physical health

      Conditions that are ameliorated by bathing (broken down by spring quality):

      Cuts, peripheral circulatory disturbance, sensitivity to cold, depression, skin infection

      Conditions that are ameliorated by drinking (broken down by spring quality):

      Atrophic gastritis, constipation, biliary tract disease, hypercholesterolemia

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