Marushin Electric Mfg. Co., Ltd., founded in 1947 and headquartered in Tokyo, Japan, is a specialized manufacturer of electronic connectors, switches, and terminal blocks. The company has grown to become a reliable supplier for various industries including automotive, industrial equipment, consumer electronics, and telecommunications. Marushin's core product lines include FPC/FFC connectors, board-to-board connectors, wire-to-board connectors, and a wide range of slide, tactile, and rotary switches. Among its notable series are the MJ series low-profile connectors for mobile devices, the SW series sealed switches for harsh environments, and high-current terminal blocks for power applications. The company emphasizes precision engineering and offers custom solutions to meet specific customer requirements. With ISO 9001 and IATF 16949 certifications, Marushin ensures high quality and reliability in its production. While not among the top global semiconductor players, it holds a respected niche in the connector market, particularly in Japan and Asia-Pacific regions, known for its durable and innovative interconnection products. Its Musen division originally focused on radio frequency components, expanding the company's expertise into antenna connectors and RF solutions.