NTA: e-Tax reopens after suspicious traffic; no taxpayer-data leak
e-Tax reopened on 5 November after checks following suspicious traffic. The NTA confirmed that taxpayer information had not leaked.
Every organization listed paused its services as a precaution; none is listed as hit.
Disclosed
2026-11-04 19:00
Organizations involved
1
Leaked or at risk
Unknown
Downtime
Unknown
What happened
What is confirmed
Report dated 2026-11-05
Timeline
- Detected, Disclosed 2026-11-04
- Resolved 2026-11-05
- 1 days
Attack or cause
- Method
- [Unknown]
- Impact
- [Service outage]
- Entry point
- Unknown
Data exposed or at risk
–
Services hit
Organizations involved
[Precautionary halt][Minor]Tokyo, ChiyodaNational government
National Tax Agency
Sources
- [1][Official]e-Tax再開のお知らせNTA · 2026-11-05
- [2][News]e―Taxに不審な通信 国税庁、一時停止にJiji Press · 2026-11-04 20:45