Keihan Holdings Warns of Possible Customer Data Leak After Third-Party Cyberattack

• Keihan Holdings identified a potential customer data breach on November 11, 2026, involving unauthorized access to Sonicmoov's COMSBI service.
• Potential exposure of LINE profile information affected up to 90,550 Kyoto Tower Sando users and 51,223 Keihan Department Store users.
• Other personal information potentially exposed affected up to 35,025 Hirakata Mall users and 28,000 Keihan Department Store users.
• Sonicmoov blocked access from the attack source and invalidated compromised credentials; stronger authentication measures are planned.
• No secondary harm had been confirmed as of November 14; the group plans to strengthen oversight of contractors' information security.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Keihan Holdings Co. Ltd. published the original content used to generate this news brief on November 14, 2026, and is solely responsible for the information contained therein.