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.
November 13, 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 (final 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.
Resumption Operations
♙s stated in our second report, we proceeded with the restoration of Electric Furnace No. 1. We completed the restoration on October 24, and operations resumed on the same day. The furnace is now operating normally.
End