> JapanHacked_
[Resolved][Severity: Moderate][Misdelivery]

Kyoto Sanga F.C.: fan club member list sent by mistake

At 11:15 on 2 September, a Kyoto Sanga F.C. staff member mistakenly attached a file with data on 15,612 fan club members to an email to a business partner. Two of the 11 recipients opened the file. It contained names, addresses, emails, phone numbers, birth dates, genders, J.League IDs and more, but no payment data. The partner deleted the email and file the same day.

Disclosed

2026-09-08

Organizations involved

1

Leaked or at risk

15.6K

15,612

Downtime

Unknown

Timeline

  1. Started, Detected, Resolved 2026-09-02
  2. Disclosed 2026-09-08
  3. 6 days

Attack or cause

Method
[Misdelivery]
Impact
[Data leak]
Entry point
E-mail

Data exposed or at risk

[Name][Postal address][E-mail address][Phone number][Date of birth][Gender]

Organizations involved

Open in organization search

Sources

  1. [1][Official]ファンクラブ会員情報誤送信による個人情報の漏えいについてKyoto Sanga F.C. · 2026-09-08