TANAKA Precious Metals

TANAKA Precious Metals is a long-established Japanese precious metals group whose core operating businesses include industrial precious metal materials, recycling, electronics, and selected medical and diagnostics activities. In healthcare, the company supplies precious metal materials and components for medical devices, including the Visi Fine radiopaque materials line for catheter and implant-related applications, and it also provides OEM/contract manufacturing for immunochromatographic in vitro diagnostic test kits. Its diagnostics capabilities are built around nano-colloidal gold, protein immobilization, nonspecific adsorption control, and antigen-antibody reaction enhancement technologies, with manufacturing managed under ISO 13485. Although TANAKA is not a therapeutics developer, it is a commercially active healthcare-adjacent supplier serving medical device and diagnostic customers with materials, development support, and manufacturing services.