Kanon Onsen (Shizuoka Prefecture) Complete Guide | Charm of Drinkable Strongly Alkaline Hot Spring and Accommodation/Day-Trip Information
Located in Shimoda City in the southern part of the Izu Peninsula in Shizuoka Prefecture, Kanon Onsen is highly regarded by hot spring enthusiasts as a rare strongly alkaline hot spring throughout Japan. Boasting a high alkalinity of pH 9.5, this hot spring is known as the “beautiful skin hot spring” and has the characteristic of allowing drinking of spring water, making it a precious hot spring destination where health benefits from both external and internal use can be expected.
This article comprehensively introduces information you should know before visiting, including Kanon Onsen’s spring quality and efficacy, details of accommodation facilities, day-trip bathing information, access methods, and surrounding tourist spots.
Kanon Onsen | Overview of a Hidden Hot Spring in Shimoda City, Shizuoka Prefecture
Kanon Onsen is a hot spring located in Yokogawa, Shimoda City, Shizuoka Prefecture, positioned in a quiet environment surrounded by the rich nature of the Izu Peninsula. The name of the hot spring comes from the Kanon Hall in this area and has long been familiar to local residents.
History and Discovery of Kanon Onsen
The Kanon Onsen spring source was discovered in the early Showa period as a relatively new hot spring. It is said that local residents accidentally discovered it while excavating land, and subsequent investigations revealed it to be a high-quality hot spring with high alkalinity and abundant minerals.
Currently, one inn operates as “Kanon Onsen,” and its reputation has spread through word of mouth due to the quality of its spring water, making it a popular spot visited by many hot spring fans from throughout the country.
Location and Surrounding Environment
Located approximately 20 minutes by car from the Shimoda city center, Kanon Onsen is positioned in the mountainous area of the Izu Peninsula, surrounded by lush mountains. Its location allows visitors to enjoy hot springs in nature away from urban hustle and bustle.
Kanon Onsen’s Spring Quality and Efficacy | pH 9.5 Strongly Alkaline Hot Spring
The greatest characteristic of Kanon Onsen lies in its spring quality. As a rare strongly alkaline hot spring throughout Japan, high effects can be expected in both beauty and health.
Detailed Spring Quality Data
- Spring Quality: Sodium bicarbonate spring (soda spring)
- pH Value: 9.5 (strongly alkaline)
- Source Water Temperature: Approximately 30°C
- Discharge Volume: Approximately 200 liters per minute
- Main Components: Sodium ions, bicarbonate ions, metasilicic acid, etc.
Why It Is Called “Beautiful Skin Hot Spring”
Kanon Onsen is referred to as the “beautiful skin hot spring” because it exhibits pH 9.5, a strongly alkaline level that is rare in Japan. Alkaline hot springs have the following beauty effects:
- Keratin Softening Action: Softens old keratin on the skin surface, making it easier to remove
- Emulsifying Action: Emulsifies sebum, making it easier to remove dirt from pores
- Smooth Feel: After bathing, skin becomes smooth with a “slippery” sensation
- Moisturizing Effect: Bicarbonate ions create a film on the skin, preventing water evaporation
Many bathers report impressions such as “skin is moist and supple after bathing, and makeup application improves,” particularly popular among women.
Efficacy of Drinking Spring Water and How to Drink It
Kanon Onsen is one of the few hot springs where drinking spring water is permitted. Health benefits from internal consumption can also be expected.
Efficacy of Drinking Spring Water:
- Improvement of gastrointestinal function
- Relief from constipation
- Support for liver function
- Detoxification effect
- Improvement of chronic digestive disorders
Correct Method of Drinking Spring Water:
- Drink approximately 100–200ml per intake
- Up to 3 times daily, ideally 30 minutes to 1 hour before meals
- Drink slowly over time
- Begin with small amounts if this is your first time
- Refrain from drinking if your doctor has restricted you from drinking spring water
A drinking spring water station is installed within the facility with cups provided. However, excessive drinking may cause diarrhea, so it is important to observe appropriate amounts.
Applicable Symptoms and Contraindications
Applicable Symptoms (Efficacy):
- Neuralgia, muscle pain, joint pain
- Frozen shoulder, movement paralysis, joint stiffness
- Contusions, sprains, chronic digestive disorders
- Hemorrhoids, chilliness, post-illness recovery period
- Fatigue recovery, health promotion
- Cuts, burns, chronic skin disease
- Beauty skin effects
Contraindications (Symptoms to Avoid Bathing):
- Acute illness (especially with fever)
- Active tuberculosis
- Malignant tumors
- Serious heart disease
- Respiratory failure
- Kidney failure
- Hemorrhagic disorders
- Severe anemia
- Pregnancy (especially early and late stages)
Kanon Onsen’s Accommodation Facility | Charm of a Single Inn
Kanon Onsen has “Kanon Onsen,” a single inn where guests can enjoy the hot spring. The calm atmosphere unique to a single inn and attentive service are its charms.
Room Types and Facilities
Kanon Onsen’s accommodation provides various types of guest rooms:
Japanese-Style Rooms:
- Spacious 8–12 tatami mat Japanese-style rooms
- Calm Japanese atmosphere
- Seasonal natural views from windows
Western-Style Rooms:
- Twin and double rooms
- Ideal for those preferring bed sleeping
Special Rooms:
- Guest rooms with private open-air bath
- For those seeking more luxurious stays
- Private space to monopolize the hot spring
All guest rooms are equipped with basic facilities including televisions, air conditioning, yukata robes, towels, and amenities.
Types of Hot Spring Facilities
At Kanon Onsen, you can enjoy source water flowing directly in multiple bathhouses:
Large Public Bath:
- Spacious indoor baths separated by gender
- 100% source water flowing directly
- Windows allowing views of natural scenery while bathing
Open-Air Bath:
- Open stone bath with a sense of openness
- Feel the changing seasons with your skin
- Evening stargazing possible
Reserved Bath:
- Private use possible for families or couples
- Reservation required (additional charge may apply)
- Ideal for small children
Drinking Spring Water Station:
- Dedicated space for drinking hot spring water
- Cups provided
Dining | Cuisine Using Local Ingredients
Accommodation at Kanon Onsen provides cuisine made with fresh Izu ingredients:
Dinner:
- Fresh seafood caught locally
- Izu beef and local chicken
- Creative dishes using seasonal vegetables
- Kaiseki-style cuisine basic
- Private dining room or in-room dining (depending on plan)
Breakfast:
- Japanese set meal basic
- Locally produced dried fish and hot spring egg
- Fresh vegetable salad
- Rice cooked with hot spring water
If you have allergies or dislike certain ingredients, arrangement is possible by notifying in advance.
Accommodation Rate Guide
Kanon Onsen’s accommodation rates vary by season, plan, and room type, but general guidelines are:
- Weekday 2-Person Room: 15,000–25,000 yen per person
- Weekend/Holiday Eve: 18,000–30,000 yen per person
- Special Rooms/Private Open-Air Bath Rooms: 25,000–40,000 yen per person
Rates include 2 meals (dinner and breakfast) and bathing fees.
Reservation Methods
Kanon Onsen reservations are available through:
- Official Website: Confirm latest information and room availability
- Phone Reservation: Directly call the inn
- Travel Booking Sites: Rakuten Travel, Jalan, Ikyu.com, etc.
- Travel Agencies: Branches of JTB, HIS, etc.
Early booking is recommended during busy periods (Golden Week, summer vacation, year-end/New Year, etc.).
Day-Trip Bathing Information | Enjoying Kanon Onsen Casually
You can enjoy Kanon Onsen’s spring quality through day-trip bathing without staying overnight.
Day-Trip Bathing Operating Hours and Fees
Operating Hours:
- 11:00–15:00 (final check-in 14:00)
- Closed: Irregular (confirm beforehand)
Fees:
- Adults: 1,500–2,000 yen
- Elementary School Children: 800–1,000 yen
- Infants: Free or 500 yen
※Rates may change; confirmation through the official site or phone call before visiting is recommended.
Day-Trip Bathing Usage Method and Notes
Usage Method:
- Check-in at front desk and pay fee
- Rent towels (paid) or bring your own
- Change clothes in the dressing room
- Use bathhouses (large public bath/open-air bath)
- Drink hot spring water at the drinking station (optional)
Notes:
- Capacity may be limited during crowded periods
- Overnight guests take priority; some days may not be available
- Confirming availability by phone beforehand is reassuring
- Reserved baths often cannot be used for day-tripping
- Meal service typically not provided (confirm)
Recommended Time Periods for Day-Trip Bathing
- Weekday Mornings: Relatively uncrowded, allowing leisurely bathing
- Early Weekend Time: Opening time recommended to avoid congestion
- Times to Avoid: Weekends/holidays 12:00–14:00 tend to be crowded
Access Methods to Kanon Onsen
Since Kanon Onsen is located in a mountainous area, it is important to confirm access methods beforehand.
Access by Train and Bus
From Tokyo Area:
- Approximately 2 hours 40 minutes by Limited Express Odoriko from JR Tokyo Station to Izukyu-Shimoda Station
- Approximately 20 minutes by taxi from Izukyu-Shimoda Station (approximately 4,000–5,000 yen)
From Nagoya Area:
- Shinkansen from JR Nagoya Station to Atami Station
- Izukyu Railway from Atami to Izukyu-Shimoda Station
- Taxi from Izukyu-Shimoda Station
Shuttle Service:
Kanon Onsen may provide shuttle service from Izukyu-Shimoda Station for overnight guests. As it is reservation-based, confirm and apply during booking.
Access by Car
From Tokyo Area:
- Approximately 90 minutes from “Numazu IC” on Tomei Expressway or “Nagaizumi-Numazu IC” on New Tomei Expressway
- Via Izu Longitudinal Expressway over Amagi Pass toward Shimoda
From Nagoya Area:
- Approximately 2 hours 30 minutes via “Numazu IC” on Tomei Expressway
Car Navigation Setting:
- Address: Yokogawa, Shimoda City, Shizuoka Prefecture ○○○ (confirm exact address on official site)
- Searching by phone number is most reliable
Parking:
- Free parking lot provided
- Approximately 30 parking spaces for regular cars
- Large vehicles also accommodated
Access Notes
- Winter Snow/Freezing: Snow and road surface freezing are possible around Amagi Pass in winter. Studless tires or chains recommended.
- Road Narrowness: Roads become narrower approaching the hot spring. Drive carefully watching for oncoming traffic.
- Car Navigation Errors: Older car navigation may not direct accurately. Update to latest map data or use smartphone map apps concurrently.
Tourist Spots Around Kanon Onsen
Visiting Kanon Onsen allows enjoyment of tourism in Shimoda City and southern Izu Peninsula.
Famous Sightseeing Spots in Shimoda City Area
Perry Road:
- Historic street said to be walked by Commodore Perry in the late Edo period
- Stone-paved path with planted willows showing picturesque scenery
- Lined with cafes and shops
- Approximately 20 minutes by car from Kanon Onsen
Shimoda Aquarium:
- Popular dolphin and sea lion shows
- Aquarium utilizing natural inlet
- Recommended for families with children
- Approximately 25 minutes by car from Kanon Onsen
Ryosenji Temple:
- Historic temple where the Harris Treaty supplementing the Treaty of Kanagawa was concluded
- Beautiful “namako walls” and hydrangeas in May
- Black Ship Museum also located here
- Approximately 20 minutes by car from Kanon Onsen
Natural Scenic Spots
Tsumegi Cape:
- Promontory at the southeast tip of Izu Peninsula
- 3 million narcissus flowers bloom January–February
- Scenic views of transparent sea and lighthouse
- Approximately 30 minutes by car from Kanon Onsen
Ryugu Grottoes:
- Mysterious cave created by ceiling collapse
- Viewed from above appears heart-shaped, popular photo spot
- Popular Instagram-worthy location
- Approximately 15 minutes by car from Kanon Onsen
Shirahama Oohama Beach:
- Izu’s largest white sandy beach
- Summer crowded with beach swimmers
- Also famous as a surfing spot
- Approximately 25 minutes by car from Kanon Onsen
Dining Spots
Seafood Cuisine at Shimoda Harbor:
- Fresh local fish in seafood rice bowls and sashimi sets
- Kinmedai (golden eye snapper) simmered a specialty
- Numerous eateries scattered around the harbor
Izu Beef Steak:
- Enjoy local brand beef “Izu Beef”
- Characterized by tender, high-quality meat
Seafood Barbecue:
- Some facilities allow roasting fresh seafood by the coast
Best Season to Visit Kanon Onsen
Kanon Onsen can be enjoyed year-round, with different charms each season.
Spring (March–May)
Recommended Points:
- Mild climate, comfortable conditions
- Peak season for flowers: cherry blossoms, narcissus, hydrangeas
- Golden Week highly crowded; early booking necessary
Cautions:
- Pollen allergy measures needed for those affected
Summer (June–August)
Recommended Points:
- Enjoy both sea bathing and hot spring
- Beaches like Shirahama Oohama crowded
- Summer festivals and events held
Cautions:
- Higher accommodation rates during summer holiday period
- Crowded roads and tourist spots
- Sunscreen protection essential
Autumn (September–November)
Recommended Points:
- Beautiful fall foliage season
- Stable weather ideal for sightseeing
- Peak season for seafood delicacies
- Relatively less crowded
Cautions:
- Typhoon season (September–early October); monitor weather forecasts
Winter (December–February)
Recommended Points:
- Hot spring especially enjoyable in cold season
- Tsumegi Cape narcissus peak bloom (January–February)
- Relatively reasonable accommodation rates
- Clear air, beautiful starry nights
Cautions:
- Watch for snow/ice on Amagi Pass
- Early sunset; plan activities accordingly
Hot Spring Usage Etiquette and Precautions
Observe basic etiquette to enjoy hot springs pleasantly.
Bathing Etiquette
- Rinse Off: Rinse body before entering bath
- Keep Towels Out: Place towels outside the tub
- Tie Up Hair: Bundle long hair to keep from bath water
- Don’t Swim: No swimming or diving in the bath
- Keep Quiet: Avoid loud talking or running
- Share Washing Spaces: Yield to others during crowded times
- No Intoxicated Bathing: Prohibited for safety
- Dry Off Before Dressing Room: Prevent wet floors
Drinking Spring Water Precautions
- Observe appropriate amounts (up to 3 times daily, 100–200ml per intake)
- Don’t drink excessively
- Refrain if medically restricted
- Drink hygienically (keep cups clean)
Photography Etiquette
- Photography in bath areas prohibited in principle
- Respect other users’ privacy
- Photograph only in designated areas
For Parents with Children
- Never lose sight of small children
- Avoid bathing infants without diapers or follow facility rules
- Ensure children don’t be noisy
Kanon Onsen Reviews and Reputation
Voices from those who actually visited Kanon Onsen are compiled below.
High Rating Points
Spring Quality:
- “Skin truly becomes smooth!”
- “pH 9.5 strongly alkaline is rare; beauty effects felt”
- “Pleased to drink spring water”
- “Enjoy fresh spring water flowing directly from source”
Atmosphere:
- “Quiet, calm environment”
- “Healed by natural surroundings”
- “Warm atmosphere unique to single inn”
Dining:
- “Delicious cuisine using fresh local ingredients”
- “Simmered golden eye snapper excellent”
- “Satisfied with quantity and quality”
Service:
- “Attentive staff”
- “Thoughtful attention appreciated”
Areas for Improvement
Access:
- “Inconvenient without car; far from station”
- “Difficult driving with narrow roads”
Facilities:
- “Building feels old in some areas”
- “Wish open-air bath were larger”
Pricing:
- “Would appreciate more reasonable rates”
However, despite these points, the hot spring is known as having many repeat visitors due to superior spring quality and high overall satisfaction.
Kanon Onsen Compared to Other Izu Hot Springs
Numerous hot springs exist on the Izu Peninsula, but Kanon Onsen has distinctive characteristics.
Comparison with Atami Hot Spring
Atami Hot Spring:
- Many large hotels and inns
- Developed hot spring town
- Convenient access (direct shinkansen station)
- Enriched tourist facilities
Kanon Onsen:
- Single inn, quiet
- Distinctive strongly alkaline spring quality
- Nature-surrounded environment
- Hidden hot spring atmosphere
Comparison with Shuzenji Hot Spring
Shuzenji Hot Spring:
- Historic hot spring town
- Abundant tourist spots like Bamboo Grove Path
- Multiple inn choices
Kanon Onsen:
- Higher pH value (higher alkalinity)
- Drinking spring water possible
- Quieter, more private feel
People Who Should Choose Kanon Onsen
- Hot spring enthusiasts particular about spring quality
- Women seeking beauty effects
- Those wanting quiet environments
- People wanting to experience drinking spring water
- Those appreciating hidden hot spring atmosphere
Kanon Onsen Accommodation/Day-Trip Bathing Reservations and Money-Saving Tips
Information to enjoy Kanon Onsen more economically.
Reservation Tips
Early Booking Discounts:
- Possible discounts for reservations 30 or 60 days ahead
- Check official site
Weekday Use:
- Cheaper than weekends
- Less crowded, leisurely enjoyment
Multi-Night Plans:
- Possible discounts for 2+ night stays
Travel Booking Site Point Utilization
- Rakuten Travel: Earn and use Rakuten Points
- Jalan: Accumulate Ponta Points/d Points
- Ikyu.com: Strong in luxury inns, high point return rate
Booking through point sites can accumulate additional points.
Coordination with Nearby Facilities
Discount tickets for other Shimoda attractions may be provided at the inn. Check at the front desk.
Conclusion: Refresh Mind and Body at Kanon Onsen
Kanon Onsen in Shimoda City, Shizuoka Prefecture, is a rare hidden hot spring with pH 9.5, a “beautiful skin hot spring,” highly rated by hot spring enthusiasts. This hot spring, where drinking water is possible, is a precious hot spring destination approaching health and beauty from both external and internal perspectives.
The quiet, calm atmosphere unique to a single inn, cuisine using Izu’s fresh ingredients, and above all its wonderful spring quality continue to captivate visitors. Day-trip bathing is also possible, allowing casual visits during Izu sightseeing.
While access is somewhat inconvenient, this allows for special time to refresh mind and body in a quiet environment away from urban hustle. Consider planning a stay at Kanon Onsen combined with beautiful Shimoda seas and historic sightseeing spots.
Beauty effects, health promotion, and escape from daily life. Kanon Onsen fulfills all these, a hidden gem like a precious stone of the Izu Peninsula. Please experience its wonderful spring quality once.
