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[Closed Business: Raiden Onsen in Iwanai] Day Trip Bath and 100% Natural Free flowing Hot Springs Can Be Enjoyed at Strange Semi-Mixed Bathing Indoor Bath of Miuraya Ryokan

March 10th, 2016

Raiden Onsen

Raiden Onsen (雷電温泉) is a hot-spring place along National Route 229 in Iwanai town located in the southwestern part of Otaru city, and only Miuraya Ryokan (三浦屋旅館) opens a business. Except the Miuraya Ryokan, Unfortunately, restraunts, cafes, cafes, souvenir shops and convenience stores are not built. The National Route 229 is opened in 1963, and onsen accommodations used to open a business successively, so the hot-spring place has been called "Raiden Onsenkyo (雷電温泉郷)", and was flourished. But almost onsen accommodations has been closed down, so ruins are outstanding at present.

I Look at Shakotan Peninsula
Raiden Onsen Miuraya Ryokan in Iwanai

It is said that Raiden means "a dead tree" or "a low cape" in Ainu language, but it is also said that there are some place names, Benkei's Sitting Rocks (弁慶の腰掛け岩や) and Benkei's Stacking Firewood Rocks (弁慶の薪積岩), related Yoshitune and Benkei Legend. When the Yoshitune went away from here, he said to Menuka (メヌカ), a chief's daughter, "I will come back next year", and "next year" pronounces "rainen" in Japanese, and it is said that Raiden was named a corrupted form of "rainen". The name of the origin is unclear, but I think that Raiden Onsen is so cool name. There is an entrance of Asahi Onsen (朝日温泉), a famous secret onsen, but unfortunately, the Asahi Onsen is closed now.

Atmosphere of Old Asahi Onsen Can Be Watched on Youtube

Movie of Asahi Onsen

List of Day Trip Onsen

The visitors can take a day trip bath only at the Miuraya Ryokan.

[Closed Business] Miuraya Ryokan

Miuraya Ryokan is a small-sized onsen ryokan near Raiden Lookout (雷電展望台) on a hillside, so a view is so good, and is well-known for enjoying 100% natural free flowing hot springs. A kind old couple runs it. The appearance and the interior decoration make the visitors feel Showa period. An entrance fee to a bath facility is JPY 500. A staying is possible, too. The sunset over the Sea of Japan can be seen. Unfortunately, they have been closed down since August, 2019.

Raiden Onsen Miuraya Ryokan in Iwanai
Entrance of Bathrooms
Raiden Onsen Miuraya Ryokan in Iwanai

They have 3 public bathrooms, small public bathrooms for men or women and a mixed bathing open-air bath. There is 1 semi-mixed bathing indoor bath at the sex-segregated U-shaped tiled bathrooms. Each indoor baths are the size that about 3 people take a bath. The indoor bath for men is conected to the indoor bath for women. The hot springs flew from a pipe with burbling is impressive. Black calcareous sinter dance in the water. That is so good. If there is not another bathers, I think that family visitors can enjoy themselves.

Raiden Onsen Miuraya Ryokan in Iwanai
View from Indoor Bath
Raiden Onsen Miuraya Ryokan in Iwanai
Indoor Bath for Men Is Connected to Indoor Bath for Women
Raiden Onsen Miuraya Ryokan in Iwanai

In addition, the hot springs were happened to be lukewarm for some reason when I took a bath. But I enjoyed the high quality hot springs fully because the hot springs were suitable for taking a long bath. By the way, a shower was not provided, and I poured the hot springs on myself with a washbowl from the indoor bath because hot water would not come out of a faucet.


Hot Springs Are Clear and Colorless
Raiden Onsen Miuraya Ryokan in Iwanai
Sea of Japan from Bathroom
Raiden Onsen Miuraya Ryokan in Iwanai
Hot Springs Flow from Pipe with Burbling
Raiden Onsen Miuraya Ryokan in Iwanai

The open-air bath surrounded by rocks is the size that about 3 people can take a bath. The sea of Japan can be seen from the open-air bath. Unfortunately, The open-air bath is not used in a winter. The open-air bath is a little away from dressing rooms for men or women.

Mixed Bathing Open-air Bath
Raiden Onsen Miuraya Ryokan in Iwanai
View from Mixed Bathing Open-air Bath
Raiden Onsen Miuraya Ryokan in Iwanai

The hot springs are calcium sulfate spring, and are clear and colorless and have tastless and no smell. The sum total of the hot spring ingredients are 1.650 g/kg. Shampoos and body soaps are provided at the bathroom. Because there is not a restroom at the dressing room, You should get a wash beforehand at the restroom along a corridor.

Dressing Room
Raiden Onsen Miuraya Ryokan in Iwanai
Resting Place
Raiden Onsen Miuraya Ryokan in Iwanai

Atmosphere of Miuraya Ryokan Can Be Watched on Youtube

Movie of Miuraya Ryokan

Types of Hot Springs Calcium sulfate spring (Type: Neutral, Osmotic Pressure: Low, Spring Temperature Type: Extra hot spring)
Water temperature of Hot Spring Source 53.6 C
ph 7.4
Indications -
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 Not drinking
Facilities Mixed bathing open-air bath(1), Semi-mixed bathing indoor bath(1).
Entrance fee to the bath facility Adult: JPY 500. Elementary school student: JPY 250.
Business hours 10:00-21:00
Regular closing day Irregular closing day, and New Year holidays
Parking lot A free parking lot is provided (4 cars)
Telephone number +81-135-62-1480
Home page Home page is here
Mapcode 730 649 321*64

List of Accommodations

Refer to following websites for the accommodations in Raiden Onsen.

Miuraya Ryokan(三浦屋旅館)



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