- Business
- Kohoku Kogyo CO.,LTD. manufactures and sells lead terminals for aluminum electrolytic capacitors, optical components and devices for optical fiber communication networks, and precision components using quartz glass materials; lead terminals include 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; optical communication components and devices encompass in-line optical isolators, hybrid optical isolators, optical filter devices, optical circulators, variable optical attenuators, polarized optical fiber assembled products, Faraday rotators, high purity silica glasses, optical fiber preforms, specially assembled multi-channel optical fiber arrays, optical components for submarine cables, and optical fiber arrays assembled with hermetic feedthrough. The company operates in Japan, China, rest of Asia, England, the United States, and internationally, targeting electronics, telecommunications, inspection, and medical equipment sectors with global market leadership exceeding 40% volume share and 60% value share in lead terminals and over 50% in submarine cable optical isolators. Founded in 1959 and headquartered in Nagahama-shi, Shiga Prefecture, Japan, Kohoku Kogyo strengthened its optical portfolio through the April 2024 acquisition of EpiPhotonics Co., Ltd., a developer of PLZT thin film-based optical switches, modulators, and wavelength selective switches with a U.S. development base in Silicon Valley, to accelerate next-generation optical communication technologies amid rising AI and IoT data demands.