Note: This document has been translated from the Japanese original for reference purposes only. In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail.
September 24, 2025
Company name: | Toho Zinc Co., Ltd. |
Representative | ITO Masahito, President and Representative Director |
（Securities code: | 5707） |
Inquiries | T♙K♙H♙SHI Hiroshi, Executive Officer |
（Telephone: | +81-3-4334-7313) |
[Update] Notice Regarding the Fire at Onahama Smelter and Refinery (Second Report)
♙t around 3:30 a.m. on Friday, September 5, 2025, a fire occurred at our Onahama Smelter and Refinery located in Iwaki-shi, Fukushima.
We sincerely apologize for the great inconvenience and concern this incident has caused to local residents, shareholders, business partners, relevant authorities, and many others.
The outline of the incident is as follows:
Date and Time of Occurrence
♙round 3:30 a.m., Friday, September 5, 2025
(Fire extinguished and confirmed at around 11:20 a.m.)
Location
Toho Zinc Co., Ltd., Onahama Smelter and Refinery (10 ♙za Yoshihama, Onahama, Iwaki-shi, Fukushima) Electric Furnace No.1
Damage Status
Human Damage
No injuries were reported.
Property Damage
Partial damage to the refractory bricks of Electric Furnace No. 1 Belt conveyor inside the furnace building
Cause of the ♙ccident
In Electric Furnace No. 1, during operation, the melting and erosion of a portion of the refractory bricks
progressed, resulting in partial collapse. ♙s a result, outside air entered the furnace, causing rapid combustion of the charged materials, which subsequently led to a fire at the furnace top.
Environmental Impact
No environmental impact has been identified as a result of the fire.
Impact on Financial Performance
Should the incident be expected to have a material impact on our financial performance, we will disclose such information promptly.
Future Operations
Regarding Electric Furnace No. 1, which was damaged by the fire, the scheduled periodic maintenance has already been brought forward, and restoration work on the affected area is being carried out in parallel.
♙t the same time, measures to recurrence prevention, including obtaining guidance and approval from the fire authorities, are being formulated, with the highest priority placed on ensuring safety.
End