[Important] Possible leakage of personal information due to unauthorized access to our outsourced system; apology and request for caution.

Thank you for your continued patronage of Hotel Clio Court Hakata.

We regret to inform you that a third party has exploited a vulnerability in the “RESERVE GATE α (RGα)” reservation system on the server of “NAVAC Co., Ltd.,” to which we have entrusted the operation and management of our hotel’s website and reservation system.

As a result, it has become clear that there is a high possibility that personal information of our hotel’s reservation members has been leaked.

We sincerely apologize for the great inconvenience and concern this has caused our guests.

We report the current situation and requests to our guests as follows:

1. Date and Time of Incident

November 2, 2026 (Monday)

2. Number of Records Leaked

All RESERVE GATE member information (up to approximately 350,000 records)

3. Personal Information Potentially Leaked

The following information of our hotel’s direct website reservation members is affected.

• Name
• Address/Postal Code
• Phone Number
• Email Address
• Hotel Name
• Check-in Date

*Please note that no data breaches regarding credit card information, passwords, etc., have been confirmed.

4. Request to Customers (Caution Regarding Suspicious Emails)

We have confirmed instances of suspicious emails containing hotel usage information (name, contact information, address, accommodation information, etc.) being sent to customers who may have had their information leaked. Malicious emails impersonating police investigations have also been confirmed.

These emails often include prompts to download a dedicated app or access a link, citing reasons such as “identity verification.”

If you receive such a suspicious email, please take the following actions:

• Do not click on URLs (links) included in emails.
• Do not download attached applications, etc.
• Do not reply to emails or enter credit card information, bank account information, personal information, or personal authentication information.

5. Status of the Contractor (NAVC Co., Ltd.)

Currently, for the accommodation reservation system “RGα” and related systems, measures have been taken to prevent unauthorized access, displaying a “Maintenance in Progress” screen after logging into the member’s My Page, and preventing screen transitions.

The official announcement from the contractor regarding this matter can be found below.

• NAVC Co., Ltd. Official Announcement https://www.navc2.co.jp/news_detail.php?id=44

6. Contact Information Regarding This Matter

If you have any questions or concerns regarding this matter, please contact the call center below.

[Contact Information]

NAVC ReserveGate Call Center

• Phone Number: 0800-200-1411
• Operating Hours: Weekdays 9:00 AM – 6:00 PM
• After-Hours Email Address: rgmainte@navc2.co.jp

We sincerely apologize again for the great anxiety and inconvenience caused to our customers. We will work thoroughly with our contractors to prevent recurrence and further strengthen security.