Embark on a Once-in-a-Season Coastal Adventure
Discover a hidden side of Noboribetsu on a journey that can only be made during the spring and early-summer big-tide low tides.
Accessible only a few days each month when the sea retreats far enough, this expedition offers an exceptionally rare chance to walk a coastline that most visitors never get to see.
Your route begins at Itanki Beach, home to the famous singing sands.
These volcanic silica-rich grains create a unique “squeaking” sound with every step—an enchanting natural phenomenon.From here, follow the receding tide past dramatic volcanic rock formations sculpted over thousands of years. The terrain is mostly flat, but you will cross shallow waters and rocky stretches, where the water can reach knee level depending on the tide.
At the end of the shore awaits the mysterious Sea Cave, revealed only during these exceptional low-tide windows. Here you will have plenty of time to soak in the breathtaking views and capture unforgettable photos.To make the moment even more special, enjoy a freshly prepared sandwich and a warm cup of coffee right by the cave—an exclusive dining spot that exists only when the sea allows.
“Walking the hidden coastline to the sea cave felt like discovering a secret world.”
Highlights
Exclusive Big-Tide Access
Reach the Sea Cave only during the lowest spring tides, a rare natural event few visitors ever witness.
Singing Sands
Walk across Itanki Beach, where volcanic silica makes the sand “sing” beneath your feet.
Volcanic Scenery
Admire dramatic rock layers and coastal formations shaped over millennia.
Thrilling Exploration
Navigate knee-deep shallows and rocky shores on this guided adventure.
Photographer’s Dream
Capture spectacular images of the hidden cave and surrounding seascape.
Scenic Lunch Break
Savor a sandwich and warm coffee at the cave with panoramic ocean views.
Itinerary
Meet at adex base 15 minutes beforehand to check gear and to complete formalities. If you find that you are missing any gear, you can purchase it at our shop (adex base) before the tour begins.
Itanki Parking Lot
Drive to the trailhead. (approx. 50 minutes)
Itanki Beach
Hike the coastline (50 minutes)
Sea cave (Lunch)
Have a break and lunch at the sea cave. (approx. 40 minutes)
Itanki Beach
Hike the coastline back (50 minutes)
Itanki Parking Lot
Drive to the adex base. (approx. 50 minutes)
What's included?
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Parking fees
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Food & drinks
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Landing & facility fees
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Entry or admission fee
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Goods & services tax
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Professional Guide – Your experienced guide will ensure a safe and enjoyable adventure.
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Round-trip Transportation – Free transfer to and from the starting point.
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Sandwich & Warm Coffee – Enjoy a light meal at the sea cave with breathtaking views.
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500ml Bottle of Water – Stay hydrated during your adventure.
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Insurance – Basic tour insurance for your peace of mind.
Exclusions
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Tip or gratuity
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Departure tax
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Entry tax
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Appropriate Footwear – Participants must wearHiking or Athletic Shoes with secure laces to prevent slipping or losing footwear.
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Personal Clothing – Please wear clothing that can get wet and dress according to the season.
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Additional Snacks or Drinks – Feel free to bring extra water or snacks if needed.
What do I need to bring?
Camera
Capture unforgettable moments of the stunning sea cave and coastal scenery.
Hiking or Athletic Shoes
Shoes with secure laces that won’t come off easily (No sandals or loose footwear).
Clothing that can get wet
Quick-drying and comfortable wear is recommended.
Seasonal Layers
Extra layers for warmth, depending on the weather.
Hat & Sunglasses
For sun protection.
Extra Water & Snacks
If you need more than the provided 500ml bottle.
Please note
Participants
Ages 12-75, Animals or pets allowed
Fitness Level
This tour is suitable for beginners. A moderate level of fitness is recommended for the hike, which ascends to the South Ridge at 543 meters.
Distance & Route
he hike follows a ridge trail, which is well-marked and gentle, making it accessible for beginner hikers. The total round trip distance is approximately 3 km.
Dress & Clothing
Please wear proper hiking shoes and bring warm clothing. Depending on the season and weather conditions, it can be windy or cool at the summit. We recommend being well-prepared with appropriate layers and wind protection.
Food & Snacks
We recommend bringing sufficient water and snacks, as no meals are provided during the tour.
Other Considerations
Weather conditions may affect the route and the views, but you will be able to enjoy the beautiful nature of Hokkaido regardless. We encourage participants to be prepared for changing weather.
If you have any concerns or questions, please feel free to contact us at the email address below.
info@adex-noboribetsu.co.jp
Meeting Point
Your journey begins here:
adex base
〒059-0551 JP Noboribetsu-shi 76-3 Noboribetsu-Onsencho
Cancellation Policy
If the tour is canceled due to bad weather on the day (heavy rain, strong winds, typhoons, heavy snow, etc.), we will refund 50% of the published price of the activity tour.
We will charge a cancellation fee of 100% if booking is cancelled 1 day or less before the event. 70% if booking is cancelled 2 days, 50% if booking is cancelled 7 days and10% if booking is cancelled 14 days or less before the event.
The activity tour planning products provided by ADEX Co., Ltd. (adex base) are trips planned and organized by Dai-ichi Takimotokan Noboribetsu Tourist Center Co., Ltd.