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JAENES
BPossible leakSeptember 25, 2026 announced

LEGOLAND Japan（ホテル予約）Data breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
Unconfirmed
Announced on
September 25, 2026
Severity
BIncidents centered on names and contact details.
Scale
1,557 records
Main impact
It was announced that, following unauthorized access to Amadeus systems, 1,557 LEGOLAND Japan hotel reservations may have been affected.
Information involved
Email addressPhone numberFull name
Cause / key point
The cause is under investigation.
Industry
Services & other
Listing / capital
Unlisted

Part of Merlin Entertainments.

Sources
Last updated
October 20, 2026
Email addressPhone numberFull nameHow severity is assessed →

Is this incident worth paying attention to?

Written & reviewed

笹尾 祐太朗の写真

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)

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