Company
Sompo Japan Insurance Inc.
Sompo Japan Insurance Inc. (Shinjuku, Tokyo; Finance and insurance) appears in 6 related cybersecurity incidents. The latest was disclosed on 2026-10-05.
Profile
- Industry/type
- Finance and insurance
- Location
- Tokyo, Shinjuku
- Also known as
- Sompo Japan
- Website
- https://www.sompo-japan.co.jp/
Public figures
Employees20,116Non-consolidated2026-03-31
METI: GビズインフォCapital¥167.5BNon-consolidated2026-03-31
METI: Gビズインフォ
Incident history
Disclosed 2026-10-05Updated 2026-10-26 18:29Tokyo[Investigating][Severity: Critical][Through a supplier][Major]
Scala Communications: unauthorized access to the i-ask FAQ system[Credential abuse][Data leak]Leaked 713.1KOrganizations 6Disclosed 2026-09-29Updated 2026-10-22Tokyo[Resolved][Severity: Critical][Through a supplier][Critical]
TOPPAN: Sompo Japan policyholder data sent to another insurer[Misdelivery][Data leak]Leaked 177.4KOrganizations 2Disclosed 2025-11-27Updated 2026-10-23Tokyo[Contained][Severity: Major][Through a supplier][Major]
Shin Nihon Kentei Kyokai: ransomware attack[Ransomware][Data leak][Service outage]Leaked 30KOrganizations 5Disclosed 2025-05-01Updated 2026-10-23Kanagawa, Tokyo[Resolved][Severity: Major][Through a supplier][Major]
Gion: ransomware in its document management system[Ransomware][Data leak][Service outage]Leaked 75KOrganizations 2Disclosed 2025-04-25Updated 2026-10-23Tokyo[Contained][Severity: Critical][Breached][Critical]
Sompo Japan: web system intrusion; data may have been exposed[Intrusion][Data leak]Leaked 8.4MOrganizations 1Disclosed 2024-10-07Updated 2026-10-23Tokyo[Contained][Severity: Critical][Through a supplier][Major]
Tokyo Sonpo Kantei: ransomware puts customer data of several insurers at risk[Ransomware][Credential abuse][Data leak][Extortion]Leaked 120KOrganizations 6