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Ransomware group thegentlemen hits Taiwan Otsuka Pharmaceutical
Taiwan Otsuka Pharmaceutical — a healthcare target operating in TW has been listed by the thegentlemen ransomware group on 2026-10-14. The information below reflects what the threat actor has publicly claimed on their leak site; the details have not been independently verified.
Incident Report
| Target Organization | Taiwan Otsuka Pharmaceutical |
|---|---|
| Threat Group | thegentlemen |
| Summary | Taiwan Otsuka Pharmaceutical, a healthcare organization in Taiwan, was listed by the thegentlemen ransomware group on its leak site on 2026-10-16. |
| Date of Breach | 2026-10-14 |
| Discovery Date | 2026-10-16 |
| Region | TW |
| Target Domain | otsuka.com.tw |
| Business Sector | Healthcare |
| Severity | MEDIUM |
Claim by thegentlemen
otsuka.com.tw Revenue $278.3 Million Otsuka Pharmaceutical (Taiwan) Co., Ltd. Taiwanese arm of Japan's Otsuka Holdings (TSE: 4578), operating since 1974 — first as a JV, wholly owned since 1995. HQ in Taipei's Daan District with plants in Guandu and Kaohsiung, ~500–1,000 staff, capital NT$531M, president Ryoichi Fukumoto. Core business: prescription drugs (Abilify, Mucosta, nephrology/oncology lines), consumer brands (Pocari Sweat, Nature Made, CalorieMate, SOYJOY), medical devices, and a new insurance services arm. The group posted record 2025 pharma results (+22% revenue, +43% operating profit) across 84+ countries. Taiwan-specific financials aren't published (subsidiary of a listed parent), but the entity has 52 years on the market, TFDA-registered products, and a solid employer brand with active hiring since 2024.
Posted by the thegentlemen threat actor on its public leak site. This is the group's own statement and has not been independently verified by HackerFeeds.
Sources
Disclaimer
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