Was Aichi Electric hit by ransomware?

Aichi Electric was listed by the thegentlemen 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 thegentlemen ransomware group?

thegentlemen 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 Aichi Electric breach?

thegentlemen published data attributed to Aichi Electric. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Aichi Electric Co., Ltd.

listed as Aichi Electric · Claimed by Thegentlemen · listed 2 months ago

Age

since listed · data leaked

Status timeline

ListedApr 8, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Japan
Sector: Manufacturing
Listed on leak site: Apr 8, 2026

About the victim

AI dossier — public-source company profile

Aichi Electric Co., Ltd. is a publicly listed Japanese manufacturer headquartered in Kasugai, Aichi Prefecture, founded in 1942. The company produces transformers, distribution switchgear, control systems, and industrial motors for electric power infrastructure. It serves utilities and industries across Japan and internationally, with offices and group companies both domestically and abroad.

Industry: Power Equipment & Industrial Motors Manufacturing
Address: Kasugai, Aichi Prefecture, Japan
Founded: 1942

Attack summary

Severity: high — Data has been confirmed as published (data_published status) for a publicly listed manufacturer of critical power infrastructure equipment including transformers and distribution switchgear, indicating confirmed exfiltration with potential exposure of sensitive business and operational data relevant to electric power infrastructure.

The group 'thegentlemen' claims to have published data belonging to Aichi Electric Co., Ltd., with the disclosure status recorded as data_published, indicating exfiltration and release of company data. No specific ransom demand or data volume has been stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate business data
Internal company files

What the group claims

aichidenki.jp zoominfo.com/c/aichi-electric-co-ltd/425347408 Aichi Electric Co., Ltd., founded in 1942 and headquartered in Kasugai, Aichi Prefecture, Japan, is a publicly listed manufacturer of power equipment and industrial motors. The company produces transformers, distribution switchgear, control systems, and various motors for electric power infrastructure, serving utilities and industries across Japan and internationally. Operating under the motto "Active management, Technology training, Respect for human," Aichi Electric has offices and group companies nationwide and abroad, working toward its 100th anniversary vision of contributing to a sustainable society through manufacturing

Sources

Victim siteaichidenki.jp

Source

Indexed 2 months 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 483 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post June 11, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

April 8, 2026Aichi Electric listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 483 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Aichi Electric is reported in Japan, a country with 88 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Aichi Electric 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.
Monitor for the data appearing on thegentlemen'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.