VICTIM SUPPORT
If You Were Affected
This page is the entrance after a leak, or when you suspect one. Password setup, multi-factor authentication, and how to spot phishing are on the protection guide — they are not repeated here.
Prevention, and the steps you take yourself after a leak, live on the protection guide.
From your situation to the protection guide
- Find out whether your data was involved
How to check is on the protection guide.
- A password leaked, or someone logged in without you
How to change it, and MFA, are in the beginner section of the protection guide.
- Card data, or a charge you don't recognize
When to contact the card issuer is on the protection guide.
- A message pretending to be a company or a government office
How to avoid the link is on the protection guide. Contacts for harm already done are below.
Name, address, or ID documents leaked
The victim-statement program for a leaked name, address, or ID-document number is not on the protection guide.
CIC and JICC let you tell companies that issue credit or loans that you are worried about impersonation. They do not compensate the loss itself.
Support contacts
Who to call when you are unsure. They are free. For the steps themselves, use the protection guide.
- National Police Agency — Cyber Incident Consultation ↗
Account takeover or fraud
- Consumer Hotline "188" ↗
Contract or billing trouble
- Personal Information Protection Commission — Consultation Line ↗
How personal information is handled
← Back to the protection guide
Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction