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Natural Open-air Bath Is Like Bathing in Lake Kusharo -Kotan Onsen in Teshikaga-

July 26th, 2014

Kotan Onsen

Kotan Onsen (コタン温泉) is a natural open-air hot spring facility on Lake Kussharo (屈斜路湖) shore in Teshikaga town located in the north part of Kushiro city. An entrance fee to the bath facility is free of charge. This is a bathtub surrounded by rocks. The water surface of the hot spring is same height as the water surface of the lake, it is the impression that myself totally enters the lake. This is a mixed bathing that about 4 people seem to take a bath, but the bath for men and women is partitioned by a rock only a little. Visitors can wear their swimsuits and take a bath. There are 2 changing rooms for men and women, too.

Entrance of Onsen
Kotan Onsen in Teshikaga Lake Kusharo
Good View
Kotan Onsen in Teshikaga Lake Kusharo

Whooper swans gather around the hot spring in a winter, bathers almost feel like taking a bath with them. But many tourists come to watch them, I guess the bathers are too shameful to take a bath nude.

Look of Open-air Bath
Kotan Onsen in Teshikaga Lake Kusharo
View from Open-air Bath
Kotan Onsen in Teshikaga Lake Kusharo
Look of Open-air Bath
Kotan Onsen in Teshikaga Lake Kusharoe
Whooper Swans Come Close to Us
Kotan Onsen in Teshikaga Lake Kusharo

The hot springs are sodium carbonated spring, and are clear and light yellow and have neither taste nor smell. It is very hot hot spring. Because it is free-flowing hot-spring, the hot springs seem to be drinkable. But I was not able to find a drinking hot spring facility. In addition, bathers do not have to use a shampoo and a soap because it keep nature lake from being polluted. There is a restroom near the open-air spa, but toilet papers are not provided.

Kotan Onsen in Teshikaga Lake Kusharo

Atmosphere of Kotan Onsen Can Be Watched on Youtube

Movie of Kotan Onsen

Types of Hot Springs Sodium carbonated spring (Type: Neutral, Osmotic Pressure: Low, Spring Temperature Type: Extra hot spring)
Water temperature of Hot Spring Source 68.3 C
ph 7.0
Indications Neuralgia, Muscular pain, Arthralgia, Frozen shoulder, Motor paralysis, Tightening of the joint, Bruise, Sprain, Chronic digestive diseases, Hemorrhoid, Cold sensitivity, Convalescent convalescence, Relieving fatigue, Healthy increase, Cut, Burn, Chronic skin diseases
Contraindications Acute disease(when there is the heat in particular), Active tuberculosis, Malignant tumor, Severe heart disease, Respiratory failure, Renal insufficiency, Hemorrhagic disease, High anemia, Other diseases during condition of a patient progress generally
Indications of drinking Chronic digestive diseases, Diabetes, Gout, Liver disease
Contraindications of drinking Kidney disease, High blood pressure, and diseases accompanied by edema in general
Facilities Mixed open-air bath(1)
Entrance fee to the bath facility Free of charge
Business hours Open 24 hours
Regular closing day Tuesday and Thursday
Parking lot A free parking is provided (10 cars)
Telephone number -
Home page Home page is here
Mapcode 731 521 434*46

List of Accommodations

Refer to following websites for the accommodations around Kotan Onsen.

Sanko Onsen(三香温泉)
Kussharo-Genya Youth Guesthouse(屈斜路原野ユースゲストハウス)
Kussharo Prince Hotel(屈斜路プリンスホテル)
Lakeside Resort Pension CHATRAN(レイクサイドリゾートペンションチャトラン)

A page of Secret Onsen of Hokkaido is here

Secret Onsen of Hokkaido

A page of Akan National Park is here

Akan National Park