Yokohama Technical Center was established in 1988 inside Shiroyama High-Tech Park, Yokohama-shi It mainly develops practical components such as functional module products and Microwave devices geared towards fields such as communications equipment. It is equipped with various experimental facilities to speedily conduct products to answer the market needs. The large scale anechoic room for development of noise suppression technology was constructed as a 10 meter semi-anechoic room. We have received overseas national certifications such as EN45001 (Europe), NVLAP (the USA), and AUSTEL (Australia) as well as with FCC and VCCL as an official experimental facility.