What Is Mimasaka Santo? A Guide to the Three Hot Springs of Mimasaka in Northern Okayama
Mimasaka Santo (the Three Hot Springs of Mimasaka) is the collective name for three famous hot springs in northern Okayama Prefecture: Yubara Onsen, Okutsu Onsen, and Yunogo Onsen. It is known as one of the leading hot spring areas in western Japan.
Rather than a single hot spring facility, it is easier to plan this as a regional trip that takes you through several onsen towns, each with its own character.
For international travelers, the appeal goes far beyond simply soaking in the bath.
You can stroll along rivers, take in the tranquility of mountain valleys, or stay overnight in old-fashioned hot spring towns, all of which let you experience Japan's rural onsen culture.
The three hot springs are located in Maniwa City, Kagamino Town in Tomata District, and Mimasaka City, and they are roughly 1 to 1.5 hours apart by car.
Transportation needs to be checked for each onsen town individually.
Plan your route in a sensible order by referring to official information from accommodations, tourist information centers, and transportation companies.
Yubara Onsen: An Open-Air Hot Spring Town Along the Asahi River with the Famous "Sunayu"
Yubara Onsen is located in Maniwa City, Okayama Prefecture, and stretches along the Asahi River downstream of the Yubara Dam.
With the river and mountains close at hand, it is a great fit for travelers who want to walk through a hot spring town surrounded by nature.
It is also known for its high-quality alkaline water with abundant flow, giving the hot spring a smooth, gentle feel on the skin.
The Iconic "Sunayu" and How to Enjoy the Hot Spring Town
The most famous attraction in town is "Sunayu," a natural open-air bath where hot water springs up from the bed of the Asahi River.
Ranked as the "Yokozuna of the West" in the national open-air bath rankings, it features three pools at different temperatures known as "Bijin-no-Yu (Beauty Bath)," "Kodakara-no-Yu (Fertility Bath)," and "Choju-no-Yu (Longevity Bath)."
Thanks to the cooperation of local residents, it is open 24 hours a day free of charge, but it is closed for cleaning on Wednesday mornings.
Because it is a mixed-gender open-air bath, it is a good idea to check the posted rules before using it.
In the town itself, you can take your time enjoying river views, bridges, foot baths, and the local hot spring museum.
Yubara is recommended for travelers who want to experience an open and lively hot spring town.
How to Get to Yubara Onsen and Tips for Your Stay
By car, it is about 10 minutes from the Yubara IC on the Yonago Expressway. By public transportation, take a Hiruzen Kogen-bound bus from JR Chugoku Katsuyama Station for about 35 minutes, get off at "Yubara Onsen," and walk for just a few minutes (up to about 5 minutes).
If you are staying overnight, check each ryokan's official information for meal options, bathing hours, and whether private baths are available.
Okutsu Onsen: A Quiet "Beauty Bath" Surrounded by Mountains and a Clear River
Okutsu Onsen is located in Kagamino Town, Tomata District, Okayama Prefecture, and is a calm hot spring town nestled in the mountains along the upper reaches of the Yoshii River.
It is a simple alkaline hot spring known as a "Bijin-no-Yu" (Beauty Bath), long beloved for water that leaves the skin feeling smooth.
Rather than busy town strolls, it suits travelers who want to relax quietly while listening to the sounds of nature.
Experience Traditional Toji (Hot-Spring Therapy Stay) Culture and "Ashibumi" Foot Washing at Okutsu
In Okutsu, you can stroll around ryokans and day-use hot spring facilities while taking in the atmosphere of a mountain hot spring town.
Distinctive facilities include "Meisen Kagi-no-Yu Okutsuso," where hot spring water bubbles up from beneath your feet; "Okutsu Onsen Hanabijin-no-Sato," which offers day-use bathing; and the reservation-only "Hannyaji Onsen."
The famous "Ashibumi Sentaku" (traditional foot-stomping laundry) demonstration is sometimes held for visitors near the foot of Okutsu Bridge on Sundays (irregular) and holidays from March to November, starting at 9:00 a.m. and lasting about 15 minutes.
If you plan your visit around watching this, confirm the schedule on the official Kagamino Town Tourist Association website or similar sources before you head out.
How to Get to Okutsu Onsen and Seasonal Highlights
By car, it is about 25 minutes from the Innosho IC on the Chugoku Expressway. By public transportation, take a bus from JR Innosho Station for about 40 minutes and get off at "Okutsu Onsen," which is just a short walk away.
Spring greenery, summer river gorges, autumn foliage, and winter snowscapes give the area a very different feel through the seasons, so adding a walk to your itinerary creates a more relaxed stay.
Yunogo Onsen: A 1,200-Year-Old Hot Spring Town with the White Heron Legend
Yunogo Onsen is located in Mimasaka City, Okayama Prefecture, and is said to have been discovered about 1,200 years ago by the monk En'nin (Jikaku Daishi), who saw a white heron healing its wounds there. For this reason, it is also known as "Sagi-no-Yu" (Heron's Bath).
The water is a mildly alkaline sodium and calcium chloride spring, and the clear, colorless hot spring is popular among women as a "beauty hot spring."
The town offers ryokans, day-use hot spring facilities, and several easy-to-visit spots, making it a hot spring trip that is easy to plan even for first-time visitors.
Yunogo Sagi Onsenkan and Retro-Style Town Strolls in Yunogo
At "Yunogo Sagi Onsenkan," the town's main public bath, day visitors can enjoy the large hinoki cypress bath "Do-no-Yu" and the stone-built "Sei-no-Yu."
In the center of town, there is also a free foot bath called "Fureai-no-Yu," with water listed at 38 degrees Celsius, perfect for a quick stop during a walk.
At the "Yunogo Onsen Tetsudo Mokei-kan & Retro Omocha-kan" (railway model and retro toy museum), you can see model trains and Showa-era retro goods, making it a great indoor option on rainy or hot days.
In early summer, you can sometimes enjoy firefly viewing near the Otani River, adding to the variety of seasonal attractions.
How to Get to Yunogo Onsen and Onsen-Hopping Tips
By car, it is about 10 minutes from the Mimasaka IC on the Chugoku Expressway. By public transportation, take a local bus from Hayashino Station on the JR Kishin Line for about 5 to 10 minutes and get off near "Yunogo Onsen Kami" or "Yunogo Onsen."
For overnight guests, the "Yumeguri Coaster" pass (1,500 yen, valid for one year) lets you choose 3 of 9 ryokans to bathe at.
However, opening days, prices, and reservation requirements vary by facility.
To avoid confusion on site, check the operating days and usage conditions of the facilities you want to visit on their official websites before arriving.
Onsen Etiquette and Travel Tips for International Visitors
At Japanese hot springs, the basic rule is to rinse off with kakeyu (a quick water rinse) and wash your body before entering the bath.
It is also important not to put towels in the bath, not to talk loudly, and to refrain from taking photos in changing rooms or bathing areas.
Aim to soak for about 5 to 10 minutes at a time, and take frequent breaks and hydrate often.
Check Tattoo Policies and Private Bath Options in Advance
Tattoo policies vary by facility.
If you are unsure whether you can enter, contact your ryokan or day-use hot spring facility in advance.
Travelers who prefer privacy can look for ryokans with private kashikiri baths or in-room baths.
Since usage rules differ by facility, confirm before booking.
Multilingual Support, Cashless Payments, and Luggage Tips
Accommodations and tourist information centers in the Mimasaka Santo area are gradually expanding their English-language pamphlets and basic multilingual support, but as this is a rural hot spring region, some shops still accept cash only.
Check in advance whether IC cards or credit cards are accepted, and keep some cash on hand for peace of mind.
Leaving large suitcases at your accommodation and exploring town with lighter bags is the easier way to get around.
How to Plan the Order and Duration of Your Mimasaka Santo Trip
For a short visit (one night, two days), it is best to focus on a single hot spring town and enjoy it deeply.
Walking through the town, enjoying meals at your ryokan, and savoring the morning air alone gives you a strong sense of the area.
For trips of two nights or more, use Okayama Station or Tsuyama Station as your base and rent a car to combine two of the hot springs, which helps reduce travel strain.
When visiting multiple hot springs, the key is not to fill your schedule with only travel time.
Hot springs are easier to enjoy when paired with walks and breaks rather than rushed visits.
Summary: Choose Mimasaka Santo by Purpose for an Easy Hot Spring Trip in Northern Okayama
Mimasaka Santo, the Three Hot Springs of Mimasaka, is a leading hot spring region in northern Okayama where you can compare and enjoy the three distinct hot springs of Yubara, Okutsu, and Yunogo.
Yubara is the choice for travelers who want an open atmosphere along a river and the famous Sunayu, Okutsu is best for those who want a quiet, traditional therapeutic hot-spring stay, and Yunogo is ideal for those who want to enjoy the white heron legend and retro hot spring town strolls.
At every hot spring town, check the prices, opening hours, closing days, and bathing rules through official information before visiting.
Combining time for bathing with time for walking, staying, and resting makes the Mimasaka Santo experience even more relaxing.
