Mitsui Kinzoku. 

Mitsui Kinzoku Co., Ltd. is primarily involved in the manufacturing and sales of functional materials, electronic components, and vehicle parts. Its business operations are structured into four main divisions: Engineered Materials, Metals, Automotive Parts and Components, and Affiliates Coordination. The Engineered Materials segment provides products such as battery materials, exhaust gas purification catalysts, specialized powders, copper foil, and ceramic items. The Metals division deals in zinc, lead, copper, gold, and silver, while also conducting resource recycling activities. Automotive door locks are the focus of the Automotive Parts and Components segment, which handles their production and distribution. Lastly, the Affiliates Coordination segment encompasses die-cast products, items produced via powder metallurgy, copper goods, and pearlite products. The company was established in September 1874 and is headquartered in Tokyo, Japan.