high severity October 16, 2026 · 1 min read Unverified claim — what this is

Taiwan Otsuka Pharmaceutical Listed by The Gentlemen Ransomware Group

If you are a customer of Taiwan Otsuka Pharmaceutical, here’s what is being claimed, and what it would mean for you.

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 prof
— from The Gentlemen’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

Taiwan Otsuka Pharmaceutical Listed by The Gentlemen Ransomware Group

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Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

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Taiwan Otsuka Pharmaceutical is one listing. Your email is probably in others.

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Report details & sourcing

Attributed to The Gentlemen · 1061 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed October 16, 2026

Last reviewed October 16, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Sources: The Gentlemen leak site (via RansomLook)

Threat-actor tracker

The Gentlemen — 1061 incidents tracked

Every breach we've attributed to The Gentlemen, in one running log. See who else they've hit →

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