In 1959, Yaesu Musen Company was established by its current president, Sako Hasegawa, in Tokyo to produce the first single sideband communications equipment in Japan. Beginning with the model FT-20 SSB transmitter, the innovative features and quality construction of Yaesu products were recognized overseas, and Yaesu Musen began exporting in 1961. In 1966 Yaesu developed the first Japanese transceiver using transistors, the FT-100, and sales boomed the following year. Virtually all profits were reinvested to expand the Company, and the product line grew to include an all solid-state VHF FM transceiver in 1970, and the FT-101 all-mode single-unit HF station the following year. This transceiver was widely recognized as the first of its kind in the world, and the company doubled in size over the next three years, and then doubled again in the following three years while introducing digital displays and all solid-state HF mobile and base transceivers.

The ruggedness, utility and economy of Yaesu products proved especially attractive in commercial applications, and in 1976 Yaesu Musen Company established a separate design branch dedicated exclusively to commercial and professional two-way communications products which grew to nearly 45 different models and supporting products in the following five years, and is now Yaesu's largest selling product category. Yaesu Musen Company Ltd. presently consists of nearly seven hundred employees, including seventy design engineers, serving a network of over 150 independent distributors in over 60 countries dealing exclusively in two way radio communications equipment.