FILE PHOTO: The logo of Sumitomo Metal Mining Co is pictured at the company's headquarters in Tokyo, Japan, September 13, 2018. REUTERS/Ritsuko Shimizu/File Photo TOKYO : Japan's Sumitomo Metal Mining Co Ltd more than doubled its annual profit forecast on Monday thanks to surging prices of copper and nickel as well as a one-off gain from selling its stake in the Sierra Gorda copper mine in Chile.