Complete Guide to Sakazuki Onsen | Charm and How to Enjoy the Stunning Ocean View Hot Spring on the Shakotan Peninsula
Sakazuki Onsen, located in the southwestern part of the Shakotan Peninsula in Hokkaido, is a hot spring resort boasting one of the finest locations in the prefecture, where visitors can enjoy hot springs while taking in the magnificent views of the Sea of Japan. Located within the Niseko Shakotan Otaru Kaigan Quasi-National Park and designated as a National Health Resort Hot Spring Area, this hot spring town is known as a place of healing that brings together three essential elements: beautiful natural environment, abundant seafood, and high-quality hot springs.
This article provides detailed information about Sakazuki Onsen’s spring quality and therapeutic benefits, access methods, nearby tourist attractions, and recommended ways to spend your time—everything you need to know before visiting.
What is Sakazuki Onsen? A Hidden Gem Hot Spring on the Shakotan Peninsula
Sakazuki Onsen is a hot spring resort located in Okoshi-Uchimura, Tomari Village, Kamu District, Hokkaido. Situated on the southern base of the Shakotan Peninsula in a terrain jutting into the Sea of Japan, the hot spring facilities near Bentenjima Island and those along the Shigeiwa River are collectively called the “Sakazuki Onsen Resort Area.”
The name of the hot spring originates from the local place name “Sakazuki,” and the area has a history of thriving as a fishing town centered around Sakazuki Fishing Port. Currently, approximately ten inns form a quiet hot spring town, and its charm lies in its serene atmosphere far removed from urban hustle and bustle.
Sakazuki Onsen as a National Health Resort Hot Spring Area
Sakazuki Onsen is designated as a National Health Resort Hot Spring Area, recognized by the Ministry of Environment as “a hot spring resort where facilities for public use of hot springs are deemed necessary to promote public use of hot springs.” Blessed with a beautiful natural environment and equipped with conditions suitable for recuperation and wellness, it is cherished by both local residents and tourists.
Sakazuki Onsen’s Spring Quality and Benefits | Characteristics of Calcium-Sodium Sulfate Spring
Sakazuki Onsen’s spring quality is “Calcium-Sodium Sulfate Spring (Gypsum Spring)” with a spring temperature of approximately 46 degrees Celsius, a natural hot spring. Colorless and transparent, it is characterized by a soft touch on the skin, and visitors can expect beautiful skin effects as the skin feels moisturized after bathing.
Main Therapeutic Benefits
The hot spring water at Sakazuki Onsen is said to have the following benefits:
- Neuralgia, muscle pain, joint pain: Hot spring components promote blood circulation and alleviate pain
- Motor paralysis and joint stiffness: Thermal effects are expected to improve joint range of motion
- Bruises, sprains, and frozen shoulder: Reduces inflammation and promotes recovery
- Hemorrhoid disease: The thermal effect and components of the hot spring help alleviate symptoms
- Chronic digestive disorders: Promotes activation of visceral functions
- Post-illness recovery, fatigue recovery, and health promotion: Enhances recovery through whole-body blood circulation improvement
- Arteriosclerosis: Expected to maintain blood vessel flexibility
- Chronic skin diseases: Bactericidal action of sulfate springs is effective for skin conditions
- Cuts and burns: Promotes wound healing
- Cold sensitivity: Warms the body from its core and provides lasting blood circulation improvement effects
Characteristics of Sulfate Springs (Gypsum Springs)
Calcium sulfate springs contain abundant calcium ions and sulfate ions, and are also called “healing springs” and “stroke springs.” They have the effect of dilating blood vessels in the skin and are characterized by high heat retention. Since warmth continues even after bathing, they are especially recommended for those with poor circulation.
Sakazuki Onsen’s Greatest Appeal | Spectacular Ocean View of the Sea of Japan
Sakazuki Onsen’s greatest appeal is undoubtedly the spectacular views overlooking the Sea of Japan. In particular, at “Shiokakaso,” the flagship inn of Sakazuki Onsen, guest rooms, open-air baths, and dining areas all offer ocean views, allowing guests to enjoy the sea views throughout their stay.
Open-Air Bath Overlooking the Sea of Japan
The open-air baths at Sakazuki Onsen offer panoramic views of the Sea of Japan spreading out before you. Especially at sunset, as the sun sinks below the horizon and paints the sea red, soaking in the hot spring while watching the sky’s colors change moment by moment offers a luxurious experience.
Bathing while listening to the sound of waves allows you to forget your daily fatigue in this blissful moment. Depending on the season, you can also enjoy the fantastical night view of fishing lights floating on the sea.
The Sea’s Expressions Through the Four Seasons
At Sakazuki Onsen, you can enjoy the sea’s different character with each season:
- Spring: As snow melts, the sea becomes calm, and clear blue water spreads across the horizon
- Summer: During the bathing season, the coastline is full of activity, and the deep blue Sea of Japan is vibrant
- Autumn: The season when sunsets are most beautiful, with the sea surface shining in golden tones—a spectacular sight
- Winter: The powerful winter Sea of Japan with rough waves and the contrast of snowy landscapes
Sakazuki Onsen’s Accommodations | Hot Spring Inns Centered Around Shiokakaso
Approximately ten inns are scattered throughout the Sakazuki Onsen Resort Area, each with its own character. Most notably among them is “All Ocean-Facing Rooms Sakazuki Onsen Shiokakaso.”
Characteristics of Shiokakaso
Shiokakaso is renowned as the flagship hot spring inn representing Sakazuki Onsen:
Guest Rooms: All rooms face the Sea of Japan side, and every room overlooks the sea. Windows frame a grand panorama of Sakazuki Fishing Port and the Sea of Japan, with guests able to enjoy the morning sun from their rooms and the sunset in the evening.
Hot Spring Facilities: An open-air bath and indoor bath allow guests to bathe while viewing the sea. The spring is a calcium sulfate spring, with a 98-degree sauna and 12-degree cold water bath also available. The outdoor air bath area allows relaxation while feeling the Sea of Japan’s salty breeze.
Cuisine: Fresh seafood caught at Sakazuki Fishing Port and surrounding areas is the pride of the inn. Guests can enjoy Shakotan Peninsula specialties including sea urchin, abalone, scallops, and sweet shrimp. Seafood caught in the transparent sea known as “Shakotan Blue” is particularly outstanding in freshness and flavor.
Day-Trip Bathing Options
Some facilities at Sakazuki Onsen offer day-trip bathing. However, usage hours and fees vary by facility and may change depending on the season or day of the week, so advance confirmation is recommended.
When using day-trip bathing, it’s advisable to bring your own towels and bathing supplies or confirm in advance whether the facility offers rental or sales.
Access to Sakazuki Onsen | How to Get There by Car or Public Transportation
Sakazuki Onsen is located in the southwestern part of the Shakotan Peninsula, approximately two and a half hours by car from central Sapporo.
Access by Car
From Sapporo area:
- From Sapporo take Route 5 toward Otaru
- From Otaru take Route 229 (known as Oiwake Soran Line) toward Iwanai and Shin-Yoshii
- Continue about 60 km on Route 229 and follow signs for Tomari Village and Sakazuki Onsen
- Travel time: approximately 2 hours 30 minutes to 3 hours
From New Chitose Airport:
- Take the Dō-ō Expressway toward Otaru
- Exit at Otaru IC and proceed via Routes 5 and 229
- Travel time: approximately 3 hours
When using car navigation, search for “Okoshi-Uchimura, Tomari Village, Kamu District, Hokkaido” or the facility name.
Access by Public Transportation
JR + Bus:
- Take the JR Hakodate Main Line to “Otaru Station” or “Kutchan Station”
- Board Hokkaido Central Bus (bound for Iwanai) from Otaru Station or Kutchan Station
- Get off at “Iwanai Bus Terminal”
- Transfer to a bus bound for Sakazuki Onsen area
- Get off at “Sakazuki” bus stop, a few minutes’ walk away
※Bus frequency is limited, so please confirm the schedule in advance and inquire with your accommodation about pickup services.
Pickup Services:
Some accommodations offer pickup services from Iwanai Bus Terminal or the nearest stations. Please inquire when making reservations.
Tourist Attractions Around Sakazuki Onsen | Fully Experience the Charm of the Shakotan Peninsula
When visiting Sakazuki Onsen, be sure to enjoy the nearby tourist attractions. The Shakotan Peninsula is an area known for its beautiful sea called “Shakotan Blue” and abundant natural attractions.
Scenic Spots on the Shakotan Peninsula
Kamui Cape (Kamui Misaki):
Located at the tip of the Shakotan Peninsula, this scenic spot offers panoramic views of the “Shakotan Blue” sea. From the observation deck at the end of a walking trail, a panoramic view of over 300 degrees spreads before you. About 40 minutes by car from Sakazuki Onsen.
Shimamui Coastline (Shimamui Kaigan):
A beautiful coastline that opens up after passing through a tunnel. Selected as one of “Japan’s Top 100 Beaches,” it features a spectacular view of transparent sea and steep cliffs.
Ogane Cape:
A cape near Yoshiguni Fishing Port where the sunset paints the sea golden, which is the origin of its name. From the observation deck, you can overlook the coastline of the Shakotan Peninsula.
Seafood Gourmet Spots
Shakotan Sea Urchin Bowl:
The Shakotan Peninsula is one of Hokkaido’s leading sea urchin producing areas. Particularly during the sea urchin fishing season (June to August), many food stalls serve “sea urchin bowls” made with fresh raw sea urchin.
Areas Around Sakazuki Fishing Port:
At Sakazuki Fishing Port, you can purchase fresh seafood caught locally. Scallops, sweet shrimp, octopus, and other seasonal fish and shellfish line the stalls.
Activities
Swimming:
During summer, swimming is available at Sakazuki Beach. Swimming in this transparent sea is an exceptional experience.
Shore Fishing:
The coastline of the Shakotan Peninsula is a prime fishing destination. Various fish species can be caught, including flounder, rockfish, and atka mackerel.
Sea Kayaking and Diving:
Activities allowing close-up experience of Shakotan Blue waters. The transparent underwater world is a unique Hokkaido attraction.
Recommended Ways to Spend Your Time at Sakazuki Onsen | Sample Plans
Here are sample plans to help you fully enjoy Sakazuki Onsen.
1-Night, 2-Day Plan
Day 1:
- Afternoon: Arrive at Sakazuki Onsen and check in
- 3:00 PM onwards: Spend time relaxing in your room while enjoying the Sea of Japan views
- 4:00 PM onwards: Bathe in the open-air bath while enjoying the sunset
- 6:00 PM onwards: Dinner featuring fresh seafood
- After dinner: Evening bath viewing the fishing lights
Day 2:
- Early morning: Morning bath while viewing the sunrise
- 8:00 AM onwards: Breakfast
- 10:00 AM: Check out
- Late morning to afternoon: Shakotan Peninsula sightseeing (Kamui Cape, Shimamui Coastline, etc.)
- Lunch: Shakotan sea urchin bowl
- Evening: Return journey
Day-Trip Plan
- Morning: Tour Shakotan Peninsula scenic spots
- Lunch: Seafood cuisine
- Afternoon: Day-trip bathing at Sakazuki Onsen
- Evening: Return journey
Important Points and Advice When Visiting Sakazuki Onsen
Seasonal Differences
Sakazuki Onsen operates year-round, but the way to enjoy it varies by season:
- Winter (December to March): Roads may be icy or snowy, so winter tires or chains are essential. Visibility may worsen during snowstorms, so check weather information.
- Sea Urchin Season (June to August): The busiest tourist season. Accommodations and restaurants may be crowded, so early reservations are recommended.
Reservations and Confirmation Matters
- Make accommodation reservations early, especially during weekends, holidays, and sea urchin season
- For day-trip bathing, confirm operating hours and fees in advance
- Confirm whether pickup services are available and their conditions
- Note contact information and phone numbers in case of changes or inquiries
Packing Checklist
- Driver’s license (if driving)
- Health insurance card
- Change of clothes
- Camera (for scenic photography)
- Sunscreen (summer)
- Warm clothing (winter)
- Towels and bathing supplies (for day-trip bathing)
History and Culture of Sakazuki Onsen
Tomari Village, where Sakazuki Onsen is located, is a region that has long prospered through fishing. The place name Sakazuki is said to derive from the Ainu word “Sakka Pett (Summer River),” and many fishermen once lived around Sakazuki Fishing Port.
The exact time of the hot spring’s discovery is unclear, but records show that hot spring inns were already operating in the early Showa period. Initially cherished as a healing bath site by local fishermen and nearby residents, it has since developed as a tourist destination following the designation of the Niseko Shakotan Otaru Kaigan Quasi-National Park and recognition as a National Health Resort Hot Spring Area.
Today, it remains cherished by local people as a hot spring resort and as a place of healing away from urban hustle and bustle, appreciated by many visitors.
Summary | Enjoy the Spectacular Sea of Japan and Hot Springs at Sakazuki Onsen
Sakazuki Onsen is a hot spring resort boasting one of Hokkaido’s finest locations, where visitors can soak in high-quality hot springs while enjoying spectacular Sea of Japan views. The calcium-sodium sulfate spring offers numerous therapeutic benefits including relief from neuralgia, muscle pain, and cold sensitivity, providing complete mental and physical refreshment.
Located within the abundant natural environment of the Shakotan Peninsula and offering fresh seafood, Sakazuki Onsen is recommended not only for hot spring enthusiasts but also for travelers seeking spectacular views and those wanting to enjoy seafood gourmet cuisine.
With excellent access—approximately two and a half hours by car from Sapporo—it’s ideal for weekend getaways or as part of Hokkaido sightseeing.
The sunset over the Sea of Japan viewed from the open-air bath and the sound of waves heard while soaking in the hot spring will surely become unforgettable memories.
At Sakazuki Onsen, fully savor the majestic nature of the Sea of Japan and the healing of hot springs, and spend luxurious time refreshing both body and mind.
