Data Breach Announced by Askul Amidst RansomHouse Attack

It was a tumultuous November 4, 2025, for Askul, a Japanese retailer known for its office and household supply offerings. Askul has confirmed a significant data breach involving the notorious ransomware group RansomHouse. This breach isn’t just small potatoes; we’re talking about a massive 1.1 terabytes of sensitive customer and supplier information now floating in cyberspace, according to cybersecurity affiliates at The Record.

This ransomware incident didn’t just stop at stealing data. It also disrupted supply chains of other major players like Muji and The Loft. Askul’s online platforms, such as Lohaco and Soloel Arena, alongside private internal servers, were particularly impacted. As for now, a thorough investigation is underway into RansomHouse’s claims and the extent of the breach. This incident echoes a troubling trend seen across Japan recently, where companies like TEIN and Asahi Group Holdings have also fallen victim to similar attacks.

A Comprehensive Resource on Ransomware

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