見附市（ハピネスみつけ）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 19, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 13 records
- Main impact
- 見附市 has announced that inquiries on its migration/settlement site may have resulted in the leak of information for 13 individuals and 57 companies due to unauthorized access to Studio.
- Information involved
- Email addressPhone numberHome addressFull name
- Cause / key point
- Cause is under investigation.
- Industry
- Government & municipal
- Listing / capital
- Government / public body
見附市 (municipality)
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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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Other incidents at 見附市
Incidents related to "studio"
Incidents where the damage spread through the same service or system.
- Aand US（Studio問い合わせフォーム）2026.10.19 announced・Affected 1,024 records
- A青森市（公民連携ポータルサイト）2026.10.19 announced・Affected 11 records
- A志摩市民病院（問い合わせフォーム）2026.10.19 announced・Affected 8 records
- B秋田県（あきたデジタルアカデミー）2026.10.19 announced・Affected 164 people
- B広島県府中市（道の駅びんご府中サイト）2026.10.19 announced・Affected 123 records
- B福岡コンベンションセンター（問い合わせ・予約フォーム）2026.10.19 announced・Affected 1,185 records
Same attack method
- SSソースネクスト2026.10.15 announced・Affected 22,519,960 records
- SSバーガーキング・ジャパン(公式アプリ)2026.10.15 announced・Affected 11,180,000 records
- SS焼肉きんぐ2026.10.05 announced・Affected 10,788,963 records
- Bユミルリンク（メール配信システム）2026.10.19 announced・Affected 9,000,000 records
- SSタイムズカー(タイムズモビリティ)2026.09.25 announced・Affected 6,600,000 accounts
- Sブックオフグループ(ブックオフコーポレーション)2026.10.09 announced・Affected 6,383,279 people
Same industry
- S市立岸和田市民病院（患者書類）2026.10.16 announced・Affected 1 people
- S大崎地域広域行政事務組合消防本部（NET119・119RAIDEN）2026.10.14 announced・Affected 45 people
- S神奈川県警（使用済み運転免許証）2026.10.09 announced・Affected 30 records
- S長崎市（マイナンバーカード特急発行書類の紛失）2026.09.08 announced・Affected 4 people
- S村田製作所2026.04.27 announced・Affected 73,000 records
- S静岡市2026.01.30 announced・Affected 3,950 people
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 →