> JapanHacked_Cybersecurity incidents in Japan

Games and entertainment

teket

teket (run by teket Inc.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-11-08.

About the service

Website

https://teket.jp/

Run by

teket Inc.since 2024-06-01

Category

Games and entertainment

For

People and businesses

Incident history

Disclosed 2026-11-08Updated 2026-11-10 12:08Aichi, Fukushima, Hokkaido, Ibaraki, Ishikawa, Kanagawa, Kyoto, Osaka, Tokyo, Yamanashi[Contained][Severity: Critical][Breached][Critical]
teket: member data leak confirmed; all electronic-ticket services suspended
[Intrusion][Data leak][Service outage]Organizations 31

		Incident	Role	Impact level				Methods	Impacts		Status
2026-11-08	2026-11-10 12:08	teket: member data leak confirmed; all electronic-ticket services suspended	[Breached]	[Critical]	[Critical]	31 teket Inc., Fukushima Prefecture, Kanagawa Prefecture, Hino City, Ichinomiya City, Okazaki City, Administrative Agency for Osaka City Museums, Chuo University, Dragon Inc., Fujizakura Sports Club, Hachioji City, Hockey Japan League, Ishikawa Prefectural Music and Culture Promotion Corporation, Japan Amateur Radio League, Japan Philharmonic Orchestra, Kiyose City, Kunitachi College of Music, Kyoto City Arts and Culture Association, Kyowa Sangyo Co., Ltd., Musashino Ongaku Gakuen, Pacific Philharmonia Tokyo, Sapporo Lifelong Learning Promotion Foundation, Tokyo Reiki Kogyo Co., Ltd., Tokyo Sports and Culture Foundation, Tokyu Bunkamura Co., Ltd., Tokyu Community Corp., Tsukuba Science Expo Memorial Foundation, Yokohama DeNA BayStars Baseball Club, Inc., LF Concert, Nagoya Philharmonic Orchestra, Tokyo Sunbeams	Aichi, Fukushima, Hokkaido, Ibaraki, Ishikawa, Kanagawa, Kyoto, Osaka, Tokyo, Yamanashi	[Intrusion]	[Data leak][Service outage]	Unknown	[Contained]