Docomo-Owned Ticketing Service teket Hit by Breach, Suspended

Timeline and service status

Teket judged that the servers had probably been accessed from outside and shut down the service at 8:30 p.m. on November 5. On November 6 it confirmed that the system managing member information had been breached and that some of the stored data had reached a third party. All services remain suspended, and the company says the restart date is still under review.

What ticket holders should do

While the service is down, purchased QR tickets cannot be displayed. Ticket holders are asked to show the purchase confirmation email at the entrance, or to give the purchaser's name if they no longer have the email. Because organizers cannot scan QR codes for entry, teket will send each of them a list of buyers individually.

Why it matters

Teket lets organizers create event pages, sell tickets and manage sales with no upfront cost. It began in 2019 as an internal new-business program at Docomo, and the subsidiary was set up in October 2023. According to figures announced in December 2025, 16,000 organizers have held events on the platform and cumulative users exceed 3 million.

The combination of names, email addresses and, for some users, addresses and phone numbers raises the risk of phishing and fraud aimed at members, though the company has not said whether any misuse has been confirmed.