Hayashi Musical Instrument Company was located in Matsumoto, Japan in the 1960s. Hayashi was one of the companies associated with Jack Westheimer and manufactured Cortez, Emperador, Rider and CF Mountain branded acoustic guitars. In the early 1970s the company was bought by Pearl Musical Instrument Company. In 1977 Hayashi luthier Yasuo Momose along with some of his colleagues left Hayashi Guitars to establish Headway Guitars which then became Deviser.