Answers to common questions about reservations, reservation changes, and tent stays.
From the 2026 season, the Mitsumata-Sanso Group has introduced a credit-card deposit so that more guests can book fairly.
No. The deposit is non-refundable. Please review the cancellation policy carefully before booking.
You can cancel your hut reservation online by yourself. Depending on when you cancel, a cancellation fee may apply, so please review the cancellation policy.
If your plans change after booking, you can change your stay date free of charge until 11:59 PM five days before the stay date.
Please note: even if you call us, we cannot change or cancel your stay date by phone.
Yes. Depending on when you cancel, a cancellation fee will apply. Cancellation fees start at 12:00 AM four days before the stay date.
Yes. You can change your stay date online by yourself. The deadline is 11:59 PM five days before the scheduled stay date, and there is no change fee.
If you need to change it from 12:00 AM four days before the stay date until 3:59 PM on the day of stay, please cancel the booking once, pay the required cancellation fee, and make a new reservation for your preferred date.
We offer a Cancellation Credit for guests who paid a cancellation fee, so please use it if eligible.
Please make sure the representative and companion information has been registered before cancelling, because we verify your identity against the previous cancelled reservation when the Cancellation Credit is used.
Yes. You can change the number of guests online by yourself until 4:00 PM on the day of stay, before check-in.
If the number of guests increases, please pay an additional JPY 3,000 deposit per added guest immediately by credit card.
If the number of guests decreases, a cancellation fee may apply depending on the timing. If a cancellation fee of JPY 5,000 per person per night applies, the representative of the group must pay it in cash at check-in on the day.
Yes. You can update companion or emergency-contact information online by yourself until 4:00 PM on the day of stay.
If any required details are missing or need correction after booking, please enter the correct information before entering the mountains. If required fields are left blank or inaccurate, you will not be able to check in. Thank you for helping us keep check-in smooth on the day.
If you would like to switch between breakfast and a packed lunch, we can handle that at check-in on the day of stay.
If you would like to change from a room-only booking to a meal-included plan, please complete the meal-plan change procedure by email in advance.
Subject: Meal Plan Change
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We cannot refund deposits or cancellation fees once they have been paid.
For guests who have paid a cancellation fee, we are offering a 2026-season-only Cancellation Credit. Please use it on your next booking if you are eligible.
This is a campaign for guests who paid a deposit or cancellation fee once during the 2026 season. At the next hut check-in, JPY 7,000 will be discounted from the accommodation charge.
Please make sure the representative and companion information has been registered before cancelling, because we verify your identity against the previous cancelled reservation when the Cancellation Credit is used.
Guests with a confirmed reservation receive a reservation completion email. If you received that email, your reservation has been completed successfully.
If the reservation completion email is not in your spam folder either, please contact us by email with the required information below.
Please send the email from the address where you want to receive the reservation completion email. We will re-register that email address in your reservation details.
Subject: I did not receive my reservation confirmation email
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See the required information for booking
Companion and emergency-contact information can be updated online by yourself until 4:00 PM on the day of stay. If anything was left blank or needs to be changed after booking, please enter the correct information before entering the mountains.
Please book online. Select the hut where you would like to stay and enter the required information in the reservation form. Your reservation is confirmed once the deposit payment by credit card is completed. A confirmation email will be sent after the booking is completed.
Only guests who cannot use credit-card payment may request an email reservation under certain conditions.
We do not accept reservations by phone. Please make your reservation online.
Cashless payments such as credit cards and e-money are not available at the huts. Accommodation fees, café purchases, and shop purchases must all be paid in cash.
Please make the reservation at the adult rate. The applicable amount will be discounted when you pay at check-in.
If your child is small and special room assignment consideration is needed, please contact us by email after booking.
Subject: About accommodation for children
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When booking consecutive nights, please reserve the stay with dinner and breakfast included. At check-in on the day of stay, breakfast can be changed to a packed lunch.
No. Members of the same group must use the same meal plan. We can only accommodate reductions in the number of meals at check-in on the day of stay.
If you would like to change from a room-only booking to a meal-included plan, please complete the meal-plan change procedure by email in advance.
Subject: Meal Plan Change
Required information:
You do not need to register the discount at the time of booking. The discount will be applied at reception when you pay your accommodation fee in cash. Please present the required identification, accommodation ticket, membership card, or other proof at check-in on the day of stay.
Discounts cannot be combined.
If there is still availability, yes. Please make the reservation online on the same day as well. Online bookings are not available after 2:00 PM, so if you would still like to stay, please call the hut directly to confirm whether accommodation is possible.
Bookings for 7 or more guests are treated as group bookings.
If one group of 7 people makes separate individual bookings for 3 and 4 guests, bedding and meals will be arranged separately. We cannot handle them as one single group.
Group bookings are accepted by email. Please review the notes below and send your request with all required information.
Only one group booking is accepted per day, on a first-come, first-served basis. Please note this in advance. Any changes after booking must also be communicated by email. Please also review the cancellation policy for group bookings before reserving.
Credit cards, QR code payments, and other cashless payments cannot be used for accommodation, café purchases, shop purchases, or merchandise at the huts. Please prepare cash.
Invoice payment for accommodation fees is available only for group bookings made through a tour company. Invoice payment cannot be used for café, shop, or merchandise purchases. If you would like to pay by invoice, please send the booking request from the email address where the invoice should be sent.
Subject: Group Booking Inquiry
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Yes. Hut stays are fully reservation-only. Please make your reservation online.
We do not operate a waitlist. Reservation availability is reflected on the website in real time. Cancellations may appear from around five days before the stay date, when cancellation fees begin to apply, so please check the website yourself from time to time.
Please note that even if you call us, we can only give you the same availability information shown on the website.
If the credit-card payment for your deposit or accommodation fee did not go through, or if a system error occurred, please contact us by email.
Subject: Inquiry About Reservation System Error
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Tent stays are reservation-only on designated reservation dates. On those dates, advance booking and full advance payment by credit card are required. On non-designated dates, no advance booking or advance payment is needed. Please come directly to the reception at Mitsumata-Sanso on the day of stay.
Yes, the reservation itself can be cancelled. However, prepaid tent-stay fees are non-refundable. If you would like to cancel, please contact us by email.
Please use the subject line "Tent Reservation Cancellation" and include the required information below.
Subject: Tent Reservation Cancellation
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The rental fee for a SAMAYA tent is JPY 5,000 per night. In addition to the rental fee, the tent-stay fee of JPY 2,500 per person per night also applies.
Reservations are accepted by email. If a SAMAYA tent is available and the booking is confirmed, we will send you a confirmation email. Reservations are first come, first served.
Subject: SAMAYA Tent Reservation
Required information:
If you reserve a SAMAYA tent on a designated reservation date for the tent site, both the advance tent-site reservation and payment, and the SAMAYA rental-tent reservation by email, are required. Please pay the SAMAYA tent rental fee of JPY 5,000 per day in cash at reception on the day.
If you reserve a SAMAYA tent on a non-designated reservation date, only the rental-tent reservation by email is required.
SAMAYA tents use three poles and require preparation before setup. Staff do not provide setup support, so please check the setup method in advance before coming.
Yes. If you would like dinner, breakfast, or a packed lunch, please let reception know by 4:00 PM.
On designated reservation dates for the tent site, heavy crowding is expected. Depending on the number of guests requesting meals, we may not be able to provide dinner or breakfast.
Yes. If you are staying multiple nights in the tent site, you may go out and leave the tent as it is. Check-in procedures are handled day by day, so please return to reception again at your preferred time each day.
If you are moving on, please dismantle the tent by around noon so the next day's tent guests can use the site. If you leave your tent behind while staying somewhere else, we charge JPY 1,000 per night.
There are no toilets at the tent site itself. You may use the toilets inside Mitsumata-Sanso 24 hours a day. Guests who have paid the tent-stay fee do not need to pay an additional toilet fee.
We are sorry, but due to capacity limits these are available only to guests staying in the hut. Satellite phones are available for a fee at JPY 100 per 20 seconds.
This does not apply in emergencies.
If your question is not answered above, or if you need help, please contact us by email. Including the information below helps us respond more smoothly.
Subject: Reservation Inquiry
Required information:
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