Banking and investing
One Day Supporter
One Day Supporter (run by Aioi Nissay Dowa Insurance Co., Ltd.) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2026-11-03.
About the service
- Website
- https://www.aioinissaydowa.co.jp/personal/product/other/oneday/
- Run by
- Category
- Banking and investing
- For
- People
Incident history
Disclosed 2026-11-03Updated 2026-11-04 12:44Tokyo[Investigating][Severity: Moderate][Breached][Moderate]
Mitsui Sumitomo and Aioi Nissay Dowa: unauthorized access detected, policyholder sites taken offline[Intrusion][Service outage]Organizations 2
Other incidents of the operator (2)
Disclosed 2026-04-24Updated 2026-05-14 08:05Aichi, Tokyo[Investigating][Severity: Moderate]
Aioi Nissay Dowa Insurance: secondee improperly shares Toyota data[Insider][Data leak]Organizations 2Disclosed 2025-11-27Updated 2026-05-11Tokyo[Contained][Severity: Major]
Shin Nihon Kentei Kyokai: ransomware attack[Ransomware][Data leak][Service outage]Leaked 30KOrganizations 5