阿波銀行Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- June 3, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 27,745 records
- Main impact
- A total of 27,745 personal information records were leaked, including number of shares held and some deposit/loan transaction information; PINs and similar data were not affected.
- Information involved
- Not specified in the disclosure
- Cause / key point
- Unauthorized access to the test environment through misuse of IDs/passwords.
- Industry
- Finance & insurance
- Listing / capital
- Listed company東証プライム 8388(阿波銀行)
- Sources
- Last updated
- October 20, 2026
Stock price reaction to the disclosure阿波銀行 / 東証プライム 8388
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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
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Attack method classification: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →