Thank you for your continued patronage of the Matsuyama Yushi Online Store.
It has come to light that customers' personal information was leaked externally due to unauthorized access to the email distribution service provided by Arara Inc., which is associated with the "GMO Deferred Payment Service" used by the Matsuyama Yushi Online Store.
We sincerely apologize for the inconvenience and concern caused to our customers.
■ Affected customers and leaked information: Leakage of email addresses only: 6 cases; Leakage of names and notification details in addition to email addresses: 0 cases. *The affected data belongs to purchasers who were recipients of emails sent by the law firm Martial Arts between July 20, 2026, and October 30, 2026.
We have been informed that GMO Payment Service, Inc. is individually notifying affected customers via email. Please be aware that you may receive suspicious emails or SMS messages. We ask that you exercise caution regarding such messages and refrain from accessing URLs or opening attachments contained in emails from unknown sources.
For inquiries regarding this matter, please contact the GMO Payment Service, Inc. inquiry desk listed below.
GMO Payment Service, Inc. Inquiry Hotline: 0570-666-350
Reception hours: Weekdays 10:00–17:00
Email address: support_ab@gmo-ps.com
For details, please refer to the published materials from Arara Inc. and GMO Payment Service, Inc. below.
Arara Inc.
https://www.arara.com/dcms_media/other/arara_20261102__.pdf
GMO Payment Service, Inc.
https://www.gmo-ps.com/news/20261105/
Should any new facts come to light, we will report them to you.
We would like to once again apologize for the concern and inconvenience caused to you.