About 100 years ago, the tungsten wire production technology was invented and human beings got the electric light.  Since then, tungsten and molybdenum have developed as an important material supporting very large industrial fields, such as lighting, medical apparatus, traffic, communication and broadcasting, and semiconductor.
      Tungsten and molybdenum are the material whose substitution is impossible. Moreover, these are the precious thing resources produced only in the limited area.  Therefore, human beings have to use these resources effectively.
      The companies in connection with the tungsten molybdenum material in Japan meet together, and Japan Tungsten & Molybdenum Industries Assocition is contributing for promotion and development of this industry,