Komori
Occurring Fact5408NAKAYAMA STEEL WORKS,LTD.Iron & Steel, Nonferrous Metals

(Update on Disclosed Matter) Outlook for Resumption of Operations at the Hot-Rolling Mill

Operations at the hot-rolling mill at the Funamachi Plant, which has been shut down since a fire broke out on 12 September, are expected to resume around mid-October after the fire-damaged power cables are replaced, safety checks are completed and trial operations are conducted. The cause of the fire and the amount of its impact on results are still under investigation and being calculated.

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Outlook for the resumption of operations at the hot-rolling mill

Subject Entity

NAKAYAMA STEEL WORKS,LTD.

Target Locations / Products

The hot-rolling mill at our Funamachi Plant

Occurrence12 September 2026
This disclosure09/28/2026
Cause

The investigation is continuing with the cooperation of relevant authorities and other parties, and the cause has not been determined.

Company response

Suspended operations

Suspension of operations at the hot-rolling mill

Scheduled resumption date

Around mid-October 2026

Investigation structure

Investigation is continuing with the cooperation of relevant authorities and other parties

Measures to prevent recurrence

To be considered based on matters identified through the investigation

Impact on Earnings Forecast

As the timing of the resumption of operations and subsequent production levels have not been determined, the amount of the impact will be disclosed promptly once it can be reasonably calculated.

Outlook

Operations are expected to resume around mid-October after restoration work on the fire-damaged power cables and related equipment is completed, safety checks are conducted and trial operations are performed. The investigation into the cause of the fire and consideration of measures to prevent recurrence will continue.

Planned follow-up disclosure

Scheduled to be disclosed promptly once the impact can be reasonably calculated

Event that occurred
ItemDetails
Event nameOutlook for the resumption of operations at the hot-rolling mill
Date of occurrence12 September 2026
Subject EntityNAKAYAMA STEEL WORKS,LTD.
Target Locations / ProductsThe hot-rolling mill at our Funamachi Plant
CauseThe investigation is continuing with the cooperation of relevant authorities and other parties, and the cause has not been determined.
Impact on Earnings ForecastAs the timing of the resumption of operations and subsequent production levels have not been determined, the amount of the impact will be disclosed promptly once it can be reasonably calculated.
Suspended operationsSuspension of operations at the hot-rolling mill
Scheduled resumption dateAround mid-October 2026
Investigation structureInvestigation is continuing with the cooperation of relevant authorities and other parties
Measures to prevent recurrenceTo be considered based on matters identified through the investigation
OutlookOperations are expected to resume around mid-October after restoration work on the fire-damaged power cables and related equipment is completed, safety checks are conducted and trial operations are performed. The investigation into the cause of the fire and consideration of measures to prevent recurrence will continue.
Planned follow-up disclosureScheduled to be disclosed promptly once the impact can be reasonably calculated
Items this document does not state (13)
Date recognized / date notice receivedAmount of Impact on Business PerformanceAccounting period in which recognizedType of litigation or proceedingCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionDirectors' 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.

Based on on-site inspections, damage to the equipment itself was minor, and replacement power cables and related items have already been arranged. As the timing of the resumption of operations and subsequent production levels have not been determined, the amount of the impact on results cannot yet be reasonably calculated.

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(Update on Disclosed Matter) Outlook for Resumption of Operations at the Hot-Rolling Mill | NAKAYAMA STEEL WORKS,LTD. (5408) timely disclosure | Komori