TOKYO, April 1 Japan's second-largest copper
smelter, Sumitomo Metal Mining Co Ltd, said it planned
to produce 420,000 tonnes of refined copper in the 2019/20
financial year that started this month, down 7.7 percent from a
The decline comes as the company plans a 35-day maintenance
at its Toyo Smelter & Refinery in Ehime, western Japan from
late-October, a company spokeswoman said.
Sumitomo Metal, also Japan's biggest nickel smelter, expects