The only one of its kind in Japan! A new and exciting activity that combines shower climbing and caving - with photos
- Beginners welcome - First try
- Empty-hands OK
- Solo participant
- Charter possible
- Operate rain or shine
- Children welcome
- Photo gifts
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Possible number of bookings1~
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Participating age12Age ~ 80 Age
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Duration2~3 hours
"Black Water Shower Caving" is the only activity in Japan, and it is a new play that combines the appeal of two activities: the exhilaration of shower climbing, where you enjoy playing in the water while going up the valley, and the excitement of caving, where you use your whole body to progress through the darkness of the cave. You can enjoy the calm and beautiful valley while playing with the water, sometimes going up the river with the water up to your face, sometimes crawling forward while being hit by the water current, and going down the water slide where the rocks pass by your face. There are views that will soothe your soul! There is also excitement that will make your heart flutter! Even people who are not good at sports can participate, but it is not a monotonous tour where you follow behind the guide! Based on the guide's advice, you can think for yourself and conquer the course in your own way, such as "Should I go in first, feet first, or first head first to go through the gap between the rocks?" Enjoy the beautiful nature and have fun on the river to your heart's content!
While playing in the water, you can gaze at the calm and beautiful valley, sometimes wading in the water up to your face as you swim upstream, sometimes crawling forward while being hit by the current, and going down a water slide where rocks just barely pass by your face. There are views that will soothe your soul! There are also exciting experiences that will get your heart racing! Enjoy the beautiful nature and have fun on the river to your heart's content!
This event is held in a special field where numerous large and oddly shaped rocks are piled up in a beautiful valley! This is the only place where you can enjoy "Black Water Shower Caving," which combines the appeal of two activities: the exhilaration of shower climbing, where you enjoy playing in the water while going up the valley, and the thrill of caving, where you use your whole body to progress through the darkness of the cave!
Even people who are not good at sports can participate, but it is not a monotonous tour where you follow behind the guide! The guide will give you examples and advice on how to get through the course. Based on the advice, you can think for yourself and conquer the course in your own way, such as "Should I go in feet first or head first to get through the gap in the rocks?"! Since you can participate in the tour independently, anyone can enjoy it to the fullest.
Select your preferred day
- Immediate booking OK!
- Reception closed
- Not accepted
- Request booking

About fees
Basic fee
※The list price includes tax.
※The above price is a basic fee.
※Fees may vary depending on schedule, please check the fee displayed after selecting the date.
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Not included in price |
Payment methods |
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Display of the Specified Commercial Transactions Act | Display of the Specified Commercial Transactions Act |
Reservation cancellation fee generation date | Cancellation fee will be charged from 7 days before the event date. |
About cancellation | About cancellations●If you cancel your application for personal reasons, a cancellation fee will be charged under the following conditions. (※For last-minute applications, please check that there will be no changes in the number of participants before making your reservation.)《Cancellation fees》(Counting from the day before the event)◆Up to 8 days before: Free◆7 to 2 days before: 1,000 yen◆The day before: 50% of the participation fee◆On the day: 100% of the participation fee *If you do not make it to the meeting time, your reservation will be treated as a cancellation on the day. Please be careful. (The roads are very congested, especially on holidays and weekends. Please allow yourself plenty of time.)About schedule changesIf you change the schedule for personal reasons or of your own volition, no cancellation fee will be charged up to 2 days before the event. Please note that if changes are not possible, the standard cancellation fee will be charged. |
About event termination | [Cancellation Criteria] When a heavy rain or flood warning is issued at the field. We will contact you in advance if there is a possibility of cancellation so that we do not have to gather at the site on the day and have it [cancelled]. If the program is not yet carried out, we will refund the full participation fee or change the date. Because it is an outdoor activity, we may have to decide to cancel on the day or during the program due to sudden changes in weather that are beyond our expectations. In that case, you will be responsible for accommodation and transportation costs. Please note that if the program is canceled during the program, we will consult with you about refunds depending on the situation. Please contact us in advance if you are staying in a hotel the night before. If cancellation is expected, we will contact you the day before. (Basically by the night before) If it is difficult to make a decision, we will contact you on the day before the customer's departure time to let you know whether the event will be held or not. *In that case, we will ask you for the time of contact in advance. |
Detailed information of this plan
Required minimum number of participants | 3 Person(s) |
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Possible number of bookings | 1~ |
Operating period | 2025/5/01〜2025/11/30 Not held during summer vacation period |
Assembly time | 8:00 (Morning course) 12:30 (Afternoon course) |
Booking deadline | until 16:59 the day before |
Changing room | Toilet | ||
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Shower | Parking | ||
Locker |
Dress code - Must bring items | Swimsuit, health insurance card (copy acceptable/can participate without), change of clothes, towel, bathing set |
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About rental items | Helmet, LED light, wetsuit, water shoes, elbow and knee protectors |
Matters require attention | Notes on participating in the course ●Important requests for a comfortable tour In order to ensure that everyone has a comfortable tour experience, we have prepared and provided you with the appropriate size equipment (wetsuits). After your reservation is confirmed, please fill in the participant information on the [Participation Application Form] that will be sent to the reservation applicant by email, and be sure to reply by the specified date. ●Notes ・Outdoor sports are activities that involve nature, and it cannot be said that there is absolutely no danger. Please be aware that there are risks due to unforeseen circumstances before participating. ・You may have to go through a narrow rock tunnel. If you have a tendency to dislocate your hips, please notify us in advance. ・Large people 2L to 3L or larger may not be able to go through the hole depending on its size. In that case, please note that we will take a detour route. |
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Plan attractions
What is a cave-like formation in a mountain stream? The best part of blackwater shower caving is slipping through a terrain where huge rocks are piled up in the mountain stream!
Slip through a very narrow space The size of the gap cannot be adjusted. Try your hand at turning your body and finding the tiny tunnel!
The vibrant landscape of moss is beautiful You'll be mesmerized by the view at the end of the dimly lit tunnel.
Climb the shower climbing section Sometimes we climb up a valley that is like waterfall climbing.
Feel the negative ions with your whole body Refreshing yourself under the waterfall. The power of nature is amazing.
Heart lock A work of art created by nature. Why not take a commemorative photo at Heart Rock?
Defy the water pressure and overcome the difficult obstacles! Take on the challenge of a narrow tunnel filled with flowing water. You can't get out unless you put your face in the water. Hold your breath for just a moment and aim for the goal!
The thrilling forward course Crawl forward and slip through the narrow tunnels up, down, left and right.
Enjoy the outdoors with friends We look forward to you gathering your friends and participating in this outdoor event.
Time schedule

Toyota Komo Onsen Oiden no Yu Meet at Oiden-yu, check in inside our vehicle, change at the hot spring facility, and then head to the site.
Arriving at the river The setting for your adventure is one of Japan's most beautiful valleys. Walking through beautiful nature will naturally lift your spirits.
First, get used to the water Once you arrive at the starting point, dip into the water. Getting used to the water is the key to enjoying the tour to the fullest! Get your face in the water with your friends!
Black Water Shower Caving Tour Start The exploration finally begins! Let's set off following our guide.
Commemorative photo taken at Heart Rock A rock in the shape of a heart! It's a work of art created by nature. Take a commemorative photo and show it off to everyone!
How do you tackle this tunnel? There are some parts of the course that you have to crawl through. You will have to learn how to move forward by trial and error.
Tea time while looking at the beautiful valley After using your mind and body a lot, it's time for a short break. The leader will bring you hot drinks and snacks. Drinking a drink in the middle of the valley is something special.
Let's challenge the final difficult part! Finally, the course reaches its climax. Let's crawl forward under the rocks while drowning in the water.
Arrived safely at the goal Climbing up rocks, crawling through water, and continuing on a pathless path, we finally reach the goal! Once we've played like children, our hearts are filled with a sense of accomplishment. We return to Oiden-no-Yu, where we are shown how to bathe, and then we are free to disband. Thank you very much.
Access - Map
Toyota Komo Onsen Oiden no Yu
■From Nagoya, take Route 153 towards Toyota → turn right at the "Nishimachi 4" intersection → (Route 155) → turn right at the "Kamigoro 4" intersection ■From Toyota, take Route 155 towards Toyota Interchange → turn right at the "Kamigoro 4" intersection
5 minutes walk from Shinkamigoro Station on the Aichi Loop Line, in front of Karma along National Route 155
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Selling points regarding safety
We collect information on weather, water levels, and snowfall during our activities, and predict future conditions to ensure that tours are conducted safely. We regularly inspect the field to ensure there are no dangerous conditions, and we hold training sessions for staff and share information on dangerous areas.
Insurance information | ① Domestic travel accident insurance Kyoei Fire & Marine Insurance Death/aftereffects 9.4 million yen/Hospitalization 3,000 yen/Outpatient treatment 1,500 yen/Liability insurance 10 million yen ② Liability insurance Kyoei Fire & Marine Insurance Physical compensation Payment limit 100 million yen/Accident payment limit 500 million yen Property compensation Accident payment limit 10 million yen |
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License and Qualifications | Rafting Association of Japan (RAJ) Guide Qualification |
Member organizations and associations | Rafting Association (RAJ) |
Number of staff | 5 people |
Number of instructors | 5 people |