Was Nichirei hit by ransomware?

Nichirei was listed by the Ransomhouse ransomware operation (Japan), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Ransomhouse ransomware group?

Ransomhouse is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Nichirei breach?

Ransomhouse published data attributed to Nichirei. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Nichirei

Claimed by Ransomhouse · listed 8 days ago

Age

since listed · data leaked

Status timeline

ListedJul 21, 2026
Data leakeddate unknown

At a glance

Group: Ransomhouse
Status: Data leaked
Country: Japan
Sector: Agriculture and Food Production
Listed on leak site: Jul 21, 2026

About the victim

AI dossier — public-source company profile

Nichirei Corporation is Japan's leading frozen food producer and operator of the nation's largest refrigerated warehouse capacity. The company provides end-to-end temperature-controlled logistics and operates across food procurement, processing, marine products, bioscience, and distribution infrastructure.

Industry: Frozen Food Manufacturing & Temperature-Controlled Logistics

Attack summary

Severity: medium — Victim is a major Japanese infrastructure company in food distribution, but the leak post provides no concrete evidence of data exfiltration, proof files, or operational disruption. The disclosure lacks specifics required to assess actual data compromise.

The ransomware group claims to have attacked Nichirei Corporation. No specific details are provided in the leak post regarding what data was exfiltrated or encrypted, or what operational impact occurred.

medium

What the group claims

Nichirei Corporation is a premier Japanese holding company that has established itself as a market leader by pioneering the frozen food industry and providing end-to-end temperature-controlled logistics solutions. With a clear mission to deliver true satisfaction the Group leverages its integrated capabilities across food procurement, processing, and logistics to optimize the supply chain and support the nation's food culture. As Japan's number one frozen food producer and the holder of the largest refrigerated warehouse capacity in the country, Nichirei combines advanced R&D with a robust global network to ensure quality and consistency. The company's business portfolio extends from processed foods and marine products to bioscience and logistics, serving as a critical social infrastructure for food distribution. By adapting to changing social needs and economic environments, Nichirei continues to create sustainable value and strengthen its position as a cornerstone of the food industry.

Sources

Source

Indexed 8 days ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Ransomhouse

Ransomhouse is a ransomware group that emerged in June 2021, operating primarily for financial gain through extortion campaigns targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their operational patterns suggest they function as an independent cybercriminal organization rather than a traditional ransomware-as-a-service model. Ransomhouse employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publish the information on their leak site if victims refuse to pay the demanded ransom. The group has demonstrated a broad targeting approach, with documented attacks against 187 victims primarily concentrated in the United States, China, United Kingdom, Italy, and Spain, focusing heavily on healthcare, technology, business services, and manufacturing sectors. While specific high-profile campaigns have not been extensively documented by major security firms, the group's consistent victim count and geographic distribution indicate sustained operational capability since their emergence. As of current reporting, Ransomhouse remains active with no known major law enforcement disruptions or confirmed rebranding efforts. The group has been linked to 213 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post July 21, 2026. The operation is currently active.

Also tracked as: RANSOM HOUSE.

Timeline of this disclosure

July 21, 2026Nichirei listed by Ransomhouseon the group's public leak site

Other recent disclosures by Ransomhouse

Ransomhouse has been linked to 213 public victims on Darkfield. A sample of the most recent:

See the full Ransomhouse dossier →

Sector and geography

This disclosure adds to ransomware activity in the Agriculture and Food Production sector, which has 774 disclosures indexed across all operators we track. Geographically, Nichirei is reported in Japan, a country with 89 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Ransomhouse means Nichirei appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, JPCERT/CC (Japan), as required for your jurisdiction.
Monitor for the data appearing on Ransomhouse's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.