Thank you very much for your continued patronage of our hotel.
We have recently been informed of a potential leakage of guests' personal information involving "TEMAIRAZU," the reservation management system provided by Temairazu, Inc. and used by our hotel.
We sincerely apologize for the significant concern and inconvenience this may cause our guests.

Below, we are providing the details reported by Temairazu, Inc. regarding this incident.
Please note that no information leakage originating from our hotel or our company's internal network has been identified. Nevertheless, we deeply regret the considerable concern this situation may cause our guests and once again offer our sincere apologies.

■ Report from Temairazu, Inc.
*In the report below, "we" and "our company" refer to Temairazu, Inc.
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1. Incident and Measures Taken
Late at night on Monday, September 21, 2026, we received inquiries from several accommodation facilities reporting that suspicious messages had been sent to guests who had made reservations. We immediately launched an investigation into "TEMAIRAZU."
The investigation identified a security issue in a component of a service previously provided by our company, and we confirmed that an unauthorized third party had accessed the "TEMAIRAZU" series of services.
The unauthorized access confirmed by "TEMAIRAZU" was limited to the incident that occurred on Monday, September 21, 2026. Based on our investigation to date, no similar unauthorized access has been identified on any other date.
On Saturday, September 26, 2026, we identified the source of the issue and completed the necessary measures to address the vulnerability and prevent recurrence.

2. Reservations Affected by Suspicious Messages
Based on the information currently confirmed by "TEMAIRAZU," suspicious messages were sent to some guests whose reservations meet the conditions described below.
We are continuing a detailed investigation to determine the full scope of the impact, with the assistance of an external organization specializing in information security.

＜Affected Reservations＞
・Reservations made on or before September 21, 2026
＜Information That May Have Been Viewed or Obtained Through Unauthorized Access＞
・Name
・Address
・Telephone number
・Email address
・Accommodation reservation information (name of accommodation facility, booking website, reservation number, check-in date, check-out date, accommodation charges, and other related information)
　*Credit card numbers, booking website login IDs, and passwords are not stored by the affected system.

3. Current Status and Response
The cause of the unauthorized access has been identified, and measures have been completed to address the affected area that caused the unauthorized access identified in this incident.
In addition, we are inspecting similar areas of the system and strengthening our monitoring framework as part of our ongoing efforts to prevent recurrence and further enhance security.

4. Important Information for Guests
In connection with this incident, we have confirmed cases in which suspicious emails, SMS messages, WhatsApp messages, and other communications impersonating accommodation facilities have been sent from sources other than official booking websites or accommodation facility email domains. These messages may direct recipients to external websites or request the entry of credit card or other personal information.
If you receive any suspicious communication claiming to be from an accommodation facility, please take the following precautions:

・Do not open any URLs or links contained in suspicious messages.
・Do not enter credit card details or personal information.
・Do not reply to suspicious messages.
・Do not make any payments or transfers in response to instructions contained in such messages.
・To confirm your reservation details, please contact the accommodation facility you booked or the official customer service contact of the booking website you used.
　*Your accommodation reservation will not be automatically cancelled as a result of this incident.

If you have entered your credit card information or other details on a suspicious website, please contact your credit card company immediately.
Please note that the system involved in this incident does not process or store credit card information.

5. Future Response
We will continue to take appropriate action while reporting and consulting with the police and the Personal Information Protection Commission of Japan.
Should any new information requiring disclosure become available, updates will be posted on our website as appropriate.
【Notices Regarding This Incident】
Japanese: temairazu.co.jp/pdf/1206/news-update
English: temairazu.co.jp/pdf/1207/news-update
■ Emergency Help Desk
helpdesk@temairazu.com
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We take this incident extremely seriously and recognize once again that protecting the safety and trust of our guests is one of our most important responsibilities. We remain fully committed to further strengthening security measures across our organization.
Once again, we sincerely apologize for the significant concern and inconvenience this incident has caused guests who have made reservations with us.

■ Contact Our Hotel
For inquiries, please contact the hotel where you made your reservation at stay＠hotelniwa.jp