Nippon Carbon issues fourth report on Toyama Plant fire incident

Nippon Carbon Co., Ltd. reported a fire at its Toyama Plant in Toyama City, Toyama Prefecture, on August 29, 2025, at approximately 7:15 a.m. The fire, accompanied by an explosive sound, originated in the graphitization furnace facilities used for artificial graphite electrode production. Firefighting efforts successfully extinguished the blaze by 4:00 p.m. on Sunday, August 31, 2025.

The incident caused no human casualties or spread to nearby structures. The fire damaged 4,440.32 m² of the total 10,907.45 m² floor area of the affected building, a revision from the initially announced 4,644.9 m². Investigations into the cause of the gas generation within the furnace, which led to the expulsion of high-temperature carbon particles, are ongoing.

While restoration of the graphitization furnace facilities is expected to take considerable time, Nippon Carbon anticipates an extremely limited impact on the artificial graphite electrode supply chain due to the utilization of other production facilities. The company is currently assessing the total damage and losses, promising timely disclosure if the incident materially impacts financial results.