APossible leakAugust 28, 2026 announced

コロナData breach / unauthorized access incident

Reviewed by Yutaro SasaoWritten by Leak Watch editorial teamAugust 28, 2026 published ・ October 20, 2026 updated

Occurred on: Unconfirmed
Announced on: August 28, 2026
Severity: AFinancial and HR records — information that easily translates into monetary damage.
Scale: 35,000 people
Main impact: It has been reported that up to 3.5万人 of names, addresses, and construction-related documents may have been exposed. A confirmed data leak has not been indicated.
Information involved: Home addressFull name
Cause / key point: The cause is under investigation.
Industry: Manufacturing
Listing / capital: Listed company東証スタンダード 5909(コロナ)
Sources: 当社が利用するクラウドサービスへの不正アクセスによる個人情報漏えいの可能性に関するお知らせ（お詫び）
Last updated: October 20, 2026

Stock price reaction to the disclosureコロナ / 東証スタンダード 5909

2026.08.08 〜 2026.09.18Loading…

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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: October 20, 2026

Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction