Fire at an Equity-Method Affiliate and Its Impact on the Mitsubishi Steel Group
北海製鉄株式会社, 三菱製鋼室蘭特殊鋼株式会社, and the Mitsubishi Steel Mfg.Co.,Ltd. group
北海製鉄株式会社's blast furnace and its ancillary hot-blast stoves, and 三菱製鋼室蘭特殊鋼株式会社's domestic production facilities for special steel products
Damage to and a fire involving the ancillary hot-blast stoves
An impact of approximately ¥3.5 billion on operating profit for the fiscal year ending March 2026. An accident-related loss of ¥900 million was recorded as an extraordinary loss in the consolidated financial results for the fourth quarter of the fiscal year ending March 2026.
The fiscal year ending March 2026 and the consolidated financial results for the fourth quarter of the fiscal year ending March 2026
The first quarter of the fiscal year ending March 2027 is expected to be affected to some extent by lower sales volumes and reduced productivity. Based on the current outlook, earnings are expected to recover from the second quarter.
Company response
Operations of 北海製鉄株式会社's blast furnace. Operations were suspended following the accident but have now resumed.
Already resumed. Specific resumption date: Not disclosed
北海製鉄株式会社 will work toward stable operations and the normalization of orders. With the resumption of supplies of molten iron from the blast furnace, 三菱製鋼室蘭特殊鋼株式会社 expects to secure a more stable operating structure. Earnings are expected to recover from the second quarter of the fiscal year ending March 2027.
| Item | Details |
|---|---|
| Event name | Fire at an Equity-Method Affiliate and Its Impact on the Mitsubishi Steel Group |
| Date of occurrence | 1 December 2025 |
| Subject Entity | 北海製鉄株式会社, 三菱製鋼室蘭特殊鋼株式会社, and the Mitsubishi Steel Mfg.Co.,Ltd. group |
| Target Locations / Products | 北海製鉄株式会社's blast furnace and its ancillary hot-blast stoves, and 三菱製鋼室蘭特殊鋼株式会社's domestic production facilities for special steel products |
| Cause | Damage to and a fire involving the ancillary hot-blast stoves |
| Amount of Impact on Business Performance | An impact of approximately ¥3.5 billion on operating profit for the fiscal year ending March 2026. An accident-related loss of ¥900 million was recorded as an extraordinary loss in the consolidated financial results for the fourth quarter of the fiscal year ending March 2026. |
| Accounting period in which recognized | The fiscal year ending March 2026 and the consolidated financial results for the fourth quarter of the fiscal year ending March 2026 |
| Impact on Earnings Forecast | The first quarter of the fiscal year ending March 2027 is expected to be affected to some extent by lower sales volumes and reduced productivity. Based on the current outlook, earnings are expected to recover from the second quarter. |
| Suspended operations | Operations of 北海製鉄株式会社's blast furnace. Operations were suspended following the accident but have now resumed. |
| Scheduled resumption date | Already resumed. Specific resumption date: Not disclosed |
| Outlook | 北海製鉄株式会社 will work toward stable operations and the normalization of orders. With the resumption of supplies of molten iron from the blast furnace, 三菱製鋼室蘭特殊鋼株式会社 expects to secure a more stable operating structure. Earnings are expected to recover from the second quarter of the fiscal year ending March 2027. |
Items this document does not state (14)
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 blast furnace shutdown resulted in lower sales volumes, reduced productivity and additional costs associated with alternative procurement. One-off restoration-related expenses were also incurred.