Thank you for always using "JO1 OFFICIAL SITE," "JO1 OFFICIAL FANCLUB," and "JO1 Mail."

Regarding the unauthorized access to the external email distribution service "Arara Message" (provided by Arara Co., Ltd.), which Fanplus, Inc., the operator of this website, uses to send out various announcements such as email newsletters, and the subsequent investigation has confirmed that the affected email addresses belong to customers who were using our website's email service as of October 31, 2026.

■ Target email address

As of October 31, 2026, the email addresses registered with the following services

- Email service for paid members

• Private mail service

Please note that the only information that has been confirmed to have been leaked is email addresses; no other personal information has been found to have been leaked.

Additionally, we are currently switching to a new distribution system for the email newsletters we send out from this website.

We sincerely apologize to all our members for the great concern and inconvenience we have caused.

■ A request to our members

There is a possibility that suspicious emails or phishing emails taking advantage of this situation may be sent.

Please continue to exercise extreme caution when accessing URLs in suspicious emails or emails from unknown senders, and when entering personal information or passwords.

■ Regarding future actions

Fanplus, Inc. is working with Arara Co., Ltd. to investigate the cause and confirm the scope of the impact, while also receiving advice from external expert consultants.

We will work to review and strengthen our safety management system to prevent recurrence.

We sincerely apologize once again for the concern this has caused our members.

For further details and inquiries regarding this matter, please see below.

Announcement from Fanplus, Inc.

https://fanplus.co.jp/static/fanplus/information/arara_notice_20261106.pdf

Customer Inquiry Desk

https://fanplus.co.jp/feature/arara-inquiry

Operating company: Fanplus, Inc.