> JapanHacked_
[Contained][Severity: Major][Insider]

Tokyu Livable: a former employee took a list of 25,406 condominium owners in Minato-ku and used it for direct mail

A former employee who moved to a rival firm took data on 25,406 owners of some Minato-ku condominiums, with names, addresses and owned units, and used part of it for direct mail.

Disclosed

2024-08-07

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

What happened

  1. It announced the case. It said a former employee, when leaving for a rival firm, took an internal document built from property registry data and used part of it to send direct mail. It confirmed the data was deleted from the former employee's PC, and a specialist found no history of outflow. It reported to the Ministry of Land, Infrastructure, Transport and Tourism and consulted the police with a criminal complaint in view. [1] [2]

Impact

The data taken is names, addresses, condominium names, room numbers and locations of owners of some Minato-ku condominiums, for 25,406 people. Those concerned are being contacted individually by letter. [1]

Timeline

  1. Detected, Disclosed 2024-08-07
  2. 1 days

Attack or cause

Method
[Insider]
Impact
[Data leak]
Entry point
Unknown

Data exposed or at risk

[Name][Postal address]

Organizations involved

Open in organization search

Sources

  1. [1][Official]弊社元従業員による個人情報の不正な持ち出しに関するご報告とお詫びTokyu Livable, Inc. · 2024-08-07
  2. [2][News]東急リバブル元従業員が社内資料不正持ち出し、刑事告訴視野に警察に相談ScanNetSecurity · 2024-08-19 08:05