Kohoku Kogyo CO.,LTD. manufactures and sells lead terminals for aluminum electrolytic capacitors, optical components and devices, and precision components in Japan, England, Asia, China, the United States, and internationally. It offers lead terminals, including standard type, burr-free type, edge-free type, one-side rib type, round 4-corner type, vibration-resistant type, front-back discriminative type, welded resin coating, and round bar resin coating, as well as rounding and anodic oxidation processing, and lead terminal materials. The company also provides optical communication components and devices, such as inline optical isolators, hybrid optical isolators, optical filter devices, optical circulators, variable optical attenuators, polarization maintaining optical fiber assembled with capillary and metalized fiber, optical fiber array assembled with hermetic feedthrough, specially assembled multi-channel optical fiber array, faraday rotators, high purity silica glasses, and optical fiber preforms, as well as optical components for submarine cable. The company was incorporated in 1959 and is headquartered in Nagahama, Japan.