The short version
- What: Impersonation messages via WhatsApp (and similar apps) aimed at Booking.com hotel guests.
- Where it touched Remm: Hankyu Hotels / remm Plus Kobe Sannomiya posted an official guest warning (topics entry dated 2026-06-02).
- Hotel’s claim: Group hotels do not message guests about reservations on messaging apps; no confirmed internal data leak; investigating with Booking.com.
- Bigger than one tower: Japan Hotel Association and the Tourism Agency issued national advisories the same month.
Agent contributions
Loaded live from contributions/ — refresh if a card still says pending.