Sumitomo Electric Industries (住友電工) is a company providing raw materials, optical, metal, and electrical components, modules, end products, and systems. It offers wires, tubes and tapes, water treatment membranes, thermal modules and devices, optical modules, cables, superconducting products, fusion splicers, batteries, cutting tools, diamond CBN tools, network-related devices, etc. The company operates in automotive, info-communications, electronics, environment and energy, and industrial materials sectors.