WARNING: Fraudulent Booking Messages

[IMPORTANT NOTICE]

We have prepared a summary regarding the recent cyberattack on TEMAIRAZU, the booking management system provider also used by KANAGUYA. We kindly ask all guests to take a moment to read it.

If you made a reservation on or before September 21, 2026, please be especially cautious of phishing emails or messages claiming to confirm or update your reservation. Some of these messages are extremely sophisticated and may look very convincing.

We are deeply concerned that the personal information of guests who chose to stay at KANAGUYA has been affected in this way. To help prevent any further harm, we kindly ask everyone to exercise great caution when dealing with suspicious emails or messages.

This issue is not limited to KANAGUYA; many hotels and ryokan throughout Japan have also been affected. Please remain vigilant, and please help spread awareness so that others do not fall victim to these fraudulent messages.

Temairazu, a major reservation management system provider, has published the following notice regarding this incident:

Important Notice: Possible Exposure of Guest Information and Suspicious Messages

Dear Guest,
Temairazu, Inc. provides “TEMAIRAZU,” a reservation management system for accommodation providers.
We have confirmed that unauthorized access to our system occurred and that we cannot rule out the possibility that some information related to your reservation at your scheduled accommodation may have been viewed or obtained by an unauthorized third party.
*TEMAIRAZU is a reservation management system for hotels, ryokans, and other accommodation providers that is used to manage guest reservations and connect with online booking platforms.
We sincerely apologize for the concern and inconvenience this incident has caused to our guests.
Based on the information currently available, suspicious messages have been sent to some guests whose reservations meet both of the following conditions:

The reservation was made on or before September 21, 2026.
and
The stay is scheduled for September 21, 2026, or later.
The information that may have been viewed or obtained by an unauthorized third party in connection with this incident is as follows:
・Guest name
・Telephone number
・Email address
・Accommodation name
・Check-in date
・Check-out date
・Accommodation charge
Please note that Temairazu, Inc. does not retain credit card information or login information for booking platforms.
If you receive an unexpected message claiming to be from Temairazu, an accommodation provider, or a booking platform, whether by email, SMS, WhatsApp, or another channel, please take the following precautions:
Do not open any links in the message.
Do not enter your credit card details or other personal information.
Do not reply to the message.
Do not make any payment or transfer money as instructed in the message.
To verify your reservation, contact our property directly using the contact details on our official website, or contact the booking platform through its official support channel.

If you have entered your credit card information on a suspicious website, please contact your card issuer promptly. The Temairazu system involved in this incident does not process or store credit card information.

We sincerely apologize again for the concern and inconvenience this incident may cause.

Temairazu, Inc.
https://www.temairazu.co.jp/pdf/1207/news-update