Plastic Machinery

Sumitomo Heavy Industries carries one of Japan's oldest corporate DNA strands: the Sumitomo zaibatsu traces its roots to 1590, when founder Masatomo Sumitomo wrote a business precept — 'never act against the public interest' — that the group still cites today. The industrial arm that grew out of the family's copper business began making machinery in 1888 and is now one of Japan's leading heavy equipment makers. The company's modern business spans four pillars: construction machinery (hydraulic excavators known for fuel efficiency), industrial machinery (gear reducers and gearboxes that are global bestsellers), marine equipment (ship cranes and propulsion systems), and precision machinery (plastic injection molding machines that make everything from car parts to bottle caps). Its cycloid reducers are the quiet workhorses inside countless factories. Headquartered in Tokyo with about 30,000 employees and annual revenue near ¥1.2 trillion, Sumitomo Heavy has also become a major player in the semiconductor supply chain through its precision machinery arm. For industrial buyers, its appeal is the Sumitomo name — a century-plus of engineering credibility, plus product lines deep enough to cover a factory's gear, crane, and machine needs from one supplier.