Komori
Occurring Fact5284YAMAU HOLDINGS CO.,LTD.Construction and Materials

Notice concerning misconduct by an employee of a consolidated subsidiary

It was discovered that, at 株式会社ヤマウ, a consolidated subsidiary, an employee had been illegally reselling materials used in product manufacturing from January 2021 through February 2026 and misappropriating the sale proceeds, causing approximately ¥120 million in losses. The employee was dismissed for disciplinary reasons, and legal measures, including reporting the matter to the police and seeking damages, will be pursued.

Worth reading
59In focus
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Direction
Deterioration
Direction inferred from the company’s description.
Scale
120
Millions of yen (approx.)
Wording
Conditional
How definitive the wording is.

Illegal resale of materials used in product manufacturing and misappropriation of sale proceeds

Subject Entity

株式会社ヤマウ (a consolidated subsidiary of ヤマウホールディングス)

Target Locations / Products

Materials used in product manufacturing

OccurrenceFrom January 2021 through February 2026 (resale continued over this period)
1885 days later
Awareness or receipt of noticeEarly March 2026 (discovered through an internal investigation)
16 days later
Litigation / administrative action17 March 2026 (the date of the employee's disciplinary dismissal). The date of reporting to the police and the date of filing the civil claim: Not disclosed
This disclosure03/19/2026
Cause

The employee illegally sold materials used in product manufacturing to third parties and misappropriated the proceeds. The company stated that the incident resulted from deficiencies in its management and control systems.

Amount of Impact on Business Performance

Loss of approximately ¥120 million. Accounting classification, such as special loss or non-operating expenses: Not disclosed

Accounting period in which recognized

Current fiscal year (the specific fiscal year and quarter are Not disclosed)

Impact on Earnings Forecast

The impact of this matter on the consolidated earnings forecast for the current fiscal year is immaterial, and no revision will be made.

Related procedures

Type

Reporting to the jurisdictional police station, preparations for filing a damage report, and civil legal measures, including seeking damages

Court or authority

Local police station

Company response

Investigation structure

An internal investigation has been conducted since early March 2026. Third-party committee, special investigation committee and external experts: Not disclosed

Measures to prevent recurrence

1. Strengthening compliance training: Compliance training will be conducted regularly for all officers and employees to further enhance awareness of compliance. 2. Strengthening the checking system: The processes for ordering and receiving materials, as well as the methods and frequency of physical inventory counts, will be reviewed to strengthen the management and checking systems. 3. Strengthening internal audits: The audit items covered by the internal audit department will be focused, and the monitoring system will be strengthened to facilitate the early detection of misconduct. 4. Enhancing the internal reporting system: Information about the internal reporting hotline will be thoroughly disseminated to encourage its use, and efforts will be made to improve the system's effectiveness.

Outlook

The company plans to proceed with preparations for filing a damage report, civil legal measures, including seeking damages for losses incurred by ヤマウ, and the review and strengthening of its internal control systems through the recurrence-prevention measures, in an effort to restore trust.

Event that occurred
ItemDetails
Event nameIllegal resale of materials used in product manufacturing and misappropriation of sale proceeds
Date of occurrenceFrom January 2021 through February 2026 (resale continued over this period)
Date recognized / date notice receivedEarly March 2026 (discovered through an internal investigation)
Subject Entity株式会社ヤマウ (a consolidated subsidiary of ヤマウホールディングス)
Target Locations / ProductsMaterials used in product manufacturing
CauseThe employee illegally sold materials used in product manufacturing to third parties and misappropriated the proceeds. The company stated that the incident resulted from deficiencies in its management and control systems.
Amount of Impact on Business PerformanceLoss of approximately ¥120 million. Accounting classification, such as special loss or non-operating expenses: Not disclosed
Accounting period in which recognizedCurrent fiscal year (the specific fiscal year and quarter are Not disclosed)
Impact on Earnings ForecastThe impact of this matter on the consolidated earnings forecast for the current fiscal year is immaterial, and no revision will be made.
Type of litigation or proceedingReporting to the jurisdictional police station, preparations for filing a damage report, and civil legal measures, including seeking damages
Court or authorityLocal police station
Date of filing / date of action17 March 2026 (the date of the employee's disciplinary dismissal). The date of reporting to the police and the date of filing the civil claim: Not disclosed
Investigation structureAn internal investigation has been conducted since early March 2026. Third-party committee, special investigation committee and external experts: Not disclosed
Measures to prevent recurrence1. Strengthening compliance training: Compliance training will be conducted regularly for all officers and employees to further enhance awareness of compliance. 2. Strengthening the checking system: The processes for ordering and receiving materials, as well as the methods and frequency of physical inventory counts, will be reviewed to strengthen the management and checking systems. 3. Strengthening internal audits: The audit items covered by the internal audit department will be focused, and the monitoring system will be strengthened to facilitate the early detection of misconduct. 4. Enhancing the internal reporting system: Information about the internal reporting hotline will be thoroughly disseminated to encourage its use, and efforts will be made to improve the system's effectiveness.
OutlookThe company plans to proceed with preparations for filing a damage report, civil legal measures, including seeking damages for losses incurred by ヤマウ, and the review and strengthening of its internal control systems through the recurrence-prevention measures, in an effort to restore trust.
Items this document does not state (10)
PlaintiffDefendantClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateDirectors' and officers' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the changePlanned follow-up disclosure

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

The employee illegally sold materials used in product manufacturing to third parties and misappropriated the proceeds. The company stated that the incident resulted from deficiencies in its management and control systems.

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Notice concerning misconduct by an employee of a consolidated subsidiary | YAMAU HOLDINGS CO.,LTD. (5284) timely disclosure | Komori