Observed arrival · 2026-10-09
Leakage Navi: Japan’s breach tracker
A Japanese-language search and guidance site for checking publicly announced data breaches and what to do when personal information may be exposed.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People checking exposure and organizations responding to breaches
- Worth noticing
- Its published people-counts are simple sums, explicitly not deduplicated individuals; preliminary report-based alerts are excluded from the statistics.
Field notes
The homepage says incidents involving the same vendor or cloud service are grouped, reducing 199 organization-level disclosures to 193 underlying incidents. Its large people-count totals are simple sums from cases that published numbers, with overlapping individuals not removed; report-based alerts are kept out of the statistical tables. The page also directs readers to prioritize individual official notices when an organization has issued one.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
One card from the complete issue