JAPAN ELECTRONIC MATERIALS CORP. engages in the manufacture, development, and sale of electron tubes and semiconductor testing parts. It operates through the following segments: Semiconductor Testing Parts and Electron Tube Parts. The Semiconductor Testing Parts segment deals with cantilever and advanced probe cards. The Electron Tube Parts segment produces heaters, cathodes, and filaments. The company was founded on April 6, 1960 and is headquartered in Amagasaki, Japan.