Hokkaido > Central Hokkaido > Otaru Asarigawa Onsen
A popular ryokan with a large Japanese garden and 28 guest rooms with open-air baths, each with its own private hot spring
Otaru Kourakuen
Address：5-18-2 Shinko, Otaru City, Hokkaido, 047-0152, JAPAN
TEL：+81-(0)134-54-8221
| Spring Quality | ||
| Weak Alkaline Simple Hot Springs | ||
| 弱アルカリ性 単純温泉 | ||
| （Hypotonic, Weak Alkaline, Low-temperature hot spring） | ||
A gentle, leading “Hot springs for beautiful skin”, effective for mental fatigue and insomnia. |
||
Total Dissolved Substances
Hydrogen Ion Concentration
Spring Quality
Weak Alkaline
Simple Hot Springs
（Hypotonic, Weak Alkaline, Low-temperature hot spring）
Total Dissolved Substances
Hydrogen Ion Concentration
pH8.4
（Weak Alkaline）
Hot springs are believed to originate from rain and snow seeping into the ground, or ancient seawater trapped deep within the earth. This water is heated by geothermal energy or magma, absorbing mineral components over a period of years—or even millennia—before finally emerging at the surface.
Open-air Bath in the Large Public Bath “Mori-no-Yuya”
The open-air bath overlooks a spacious Japanese garden featuring a large pond, offering an exceptional sense of openness. In certain seasons, you may hear the croaking of frogs, creating a feeling of being fully immersed in nature. The relaxation area of the adjacent Finnish-style sauna also provides a comfortable and soothing experience.
A skin-beautifying spring that leaves your skin
silky-smooth and helps relieve mental fatigue
Ideal for:
| People who want silky smooth skin | People who prefer gentler hot springs | People with sleep difficulties | People experiencing stress | People recovering from injury or illness |
|---|---|---|---|---|
 |
 |
 |
 |
 |
Onsen Specs
(Indications by spring quality)
Evidence of
“Hot springs for beautiful skin”
-
Weak alkaline
Exfoliation, Smooth effect -
Metasilicic acid
Moisturizing effect
Onsen Power Chart
Open-air Bath in the Large Public Bath “Iwa-no-Yu”
The open-air bath is designed with natural stones, creating a stunningly rustic atmosphere. In spring, cherry blossoms bloom, and guests can enjoy the changing scenery throughout the seasons. In addition to the spacious indoor bath with a sense of openness, a fully equipped Finnish-style sauna is also available.
Simple hot springs (under 1,000 mg/kg of dissolved substances) are gentle on the skin
and perfect for therapeutic use, making them a truly versatile spring type
Simple hot springs (under 1,000 mg/kg of dissolved substances) are gentle on the skin and perfect for therapeutic use, making them a truly versatile spring type
compared to bath additives!
Open-air Bath in Guest Room “Tsukimisou”
Each guest room features an open-air bath overlooking a lush garden, allowing guests to enjoy the changing scenery of each season. You can soak in the hot spring at any time and indulge in a truly relaxing and luxurious experience. With views that vary by room, this inn is beloved by many returning guests.
Spring Temperature
Color of water / Smell of water
Osmotic Pressure
“Osmotic pressure” classification in hot springs is a method of categorization based on the difference in concentration between the spring water's dissolved components and human bodily fluids.
|
Hypotonic
|
|||
Isotonic |
|||
|---|---|---|---|
 | It has the same osmotic pressure as human bodily fluids. This is equivalent to a saline solution (salt water) made by dissolving 8.8 grams of table salt in 1 liter of water. |
||
Hypertonic |
|||
 | The high osmotic pressure means your body moisture is easily released while the hot spring components are more readily absorbed into the body. Please be cautious of “Yu-atari” (hot spring fatigue). This is generally considered a “highly concentrated” hot spring. |
||
Spring Temperature
Color of water / Smell of water
Clear and Colorless
Odorless
Osmotic Pressure
“Osmotic pressure” classification in hot springs is a method of categorization based on the difference in concentration between the spring water's dissolved components and human bodily fluids.
|
Hypotonic
|
||
|
Isotonic
|
||
|
Hypertonic
|
||
Private Bath “Kokage-no-Ideyu”
This bathtub was originally part of the annex’s large public bath and has been renovated into a private bath, offering an impressive sense of spaciousness. Opening the large windows gives it the feel of a semi open-air bath. From here, you can enjoy a view of the inn’s proud Japanese garden below.
️
“Hot spring for beautiful skin” with a pH of 8.4
Weakly alkaline hot spring water, leaving your skin smooth and silky, combined with moisturizing metasilicic acid, creates a synergistic effect for beautifully hydrated skin.
️
Private Hot Spring Source
The distance from the spring well to the bathtub is short, so the quality of the hot spring water is less likely to deteriorate.
️
A gentle hot spring
With relatively few mineral components, it is mild and recommended for everyone, from babies to the elderly.
️
For Stress-Related Ailments
Beneficial for physical discomfort brought on by irregular habits and everyday stress.
️
For Those with Insomnia
The only condition officially recognized for “Simple Hot Springs”.Effective for difficulty falling asleep and light, restless sleep.
️
For Those Feeling Depressed
It helps activate the parasympathetic nervous system, making it effective for lifting low spirits and improving lack of motivation.
️
Relaxation Effect
With its gentle spring quality and low risk of hot spring fatigue, this hot spring allows both the mind and body to unwind.
️
Ideal for Rehabilitation
Its low-irritation spring quality makes it suitable for therapeutic use and has long earned it the names “Hot spring for stroke” and a “Hot spring for neuralgia”.
Snow-view Open-air bath in the Guestroom (1F)
From winter snow-view bathing to spring cherry blossoms, summer flowers in the Japanese garden, and vibrant autumn foliage, the scenery changes beautifully with the seasons.
| Water added No △ |
Water heated No 〇 |
Disinfected No 〇 |
Circulated No 〇 |
Bath additive No × |
|
|---|---|---|---|---|---|
| ※Because the source water is low in temperature and has a limited flow, the bath is heated and filtered for hygiene purposes.
※During one hour, 45 minutes are circulation-only, but for 15 minutes fresh hot spring water is simultaneously added to the bathtub (a combination of free-flowing and circulating water). ※The bath uses 100% natural spring water from the source, with a small amount of on-site spring water added when the water is replaced. |
|||||
| Percentage of source | Almost 100％ | ||||
Facility Data
| Founded in | 1957（Showa32） |
|---|---|
| Check in | 3:00 PM |
| Check out | 11:00 AM |
| Location | Garden |
| Rooms | Total 35 rooms |
| Capacity | 134 people |
| Parking | 30 cars |
| Facilities | Lounge, Cafe, Spa, Smoking room, Banquet hall |
| Internet | Wi-Fi available |
| Barrier-free | Supported |
| Bidet toilet | Equipped |
Keywords for this inn
| A Japanese garden stretching across 8,000 tsubo (approx. 26,400 m²) property, offers beautiful seasonal scenery throughout the year. |
| 28 open-air bath guest rooms in a variety of styles. |
| All 28 open-air bath guest rooms come in various types, including Japanese and Japanese–Western rooms. |
| A genuine Finnish-style sauna where you can enjoy self-löyly. |
| Convenient access to popular sightseeing spots, including the Otaru Canal. |
Transportation Access
| By train | ●From JR New Chitose Airport Station: Take the rapid airport train to Otaru (approximately 80 min.) →From JR Otaru Chikko Station, take a taxi for about 10 minutes to reach the inn. ●From JR Sapporo Station: Take the rapid train to Otaru (approximately 30 min.) →From JR Otaru Chikko Station, take a taxi for about 10 minutes to reach the inn. |
|---|---|
| Shuttle bus | None |
| By car | Approximately 60 min. from New Chitose Airport (via Chitose IC → Asazato IC on the Hokkaido Expressway) Approximately 40 min. from Sapporo (via Asazato IC on the Hokkaido Expressway) Approximately 1 minute from Asazato IC, Sapporo Expressway |
| Address | Hokkaido／Otaru Asarigawa Onsen／Otaru Kourakuen 5-18-2 Shinko, Otaru City, Hokkaido, 047-0152 TEL:+81-(0)134-54-8221 |