Kohoku Kogyo 

Founded in Nagahama, Japan, in 1959, Kohoku Kogyo CO.,LTD. is a prominent domestic manufacturer and supplier specializing in a diverse range of high-tech products. The company's core business encompasses the production and sale of lead terminals vital for aluminum electrolytic capacitors, a comprehensive suite of optical components and devices for advanced optical fiber communication networks, and precision parts crafted from quartz glass materials. Its extensive selection of lead terminals features numerous types, such as standard, burr-free, edge-free, one-side rib, round 4-corner, vibration-resistant, and front-back discriminative designs. They also offer terminals with specialized welded resin coating and round bar resin coating. Beyond manufacturing, Kohoku Kogyo provides essential services like rounding and anodic oxidation processing, in addition to supplying the raw materials for these terminals. For the optical communication sector, the company delivers a broad portfolio of specialized devices. This includes in-line and hybrid optical isolators, optical filter devices, optical circulators, and variable light attenuators. They also develop polarized optical fiber assembled products, faraday rotators, and high-power laser assemblies equipped with end caps and anti-reflective (AR) coatings. Further expanding their offerings, Kohoku Kogyo produces high-purity silica glasses, optical fiber preforms, and critical optical components designed for submarine cables and hermetic feedthrough-assembled optical fiber arrays.