Regarding Certain Media Reports Concerning Our Company | NIDEC CORPORATION (6594) timely disclosure

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Suspected improper conduct involving changes to materials, processes, designs and other aspects of certain products without obtaining customer confirmation

Subject Entity

NIDEC CORPORATION

Target Locations / Products

Certain products

This disclosure05/13/2026

Company response

Investigation structure

The company is considering establishing an investigation committee composed of external experts, but no decision has been made at this time.

Outlook

The company has begun contacting and explaining the matter to customers in sequence, and plans to formally decide and announce today its response to the suspected quality-related improper conduct and other matters.

Planned follow-up disclosure

The company plans to formally decide and announce today its response to the suspected quality-related improper conduct and other matters.

Event that occurred
Item	Details
Event name	Suspected improper conduct involving changes to materials, processes, designs and other aspects of certain products without obtaining customer confirmation
Subject Entity	NIDEC CORPORATION
Target Locations / Products	Certain products
Investigation structure	The company is considering establishing an investigation committee composed of external experts, but no decision has been made at this time.
Outlook	The company has begun contacting and explaining the matter to customers in sequence, and plans to formally decide and announce today its response to the suspected quality-related improper conduct and other matters.
Planned follow-up disclosure	The company plans to formally decide and announce today its response to the suspected quality-related improper conduct and other matters.

Items this document does not state (19)

Date of occurrenceDate recognized / date notice receivedCauseAmount of Impact on Business PerformanceAccounting period in which recognizedImpact on Earnings ForecastType of litigation or proceedingCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateMeasures to prevent recurrenceDirectors' and officers' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the change

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 company explained that it is conducting a comprehensive quality review as part of efforts by the NIDEC CORPORATION Revitalization Committee to improve its internal control system, and that the review identified suspected improper conduct involving certain products.

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