Japan's first soprano saxophone (S-6) is placed on the market. The SN-600 sopranino model with high-E key is finished and released.

Yanagisawa displays prototypes of a new professional line integrating innovative structural design enhancements that highlight its commitment to producing flexible saxophones for a wide range of musical styles.

At a 1977 music instrument fair, Yanagisawa announces a new line of soprano, alto, and tenor models epitomizing the "Yanagisawa Technology" philosophy, thus completing a full lineup of 15 models in five saxophone categories, from sopranino to baritone.

Echoing its motto for a wind instrument manufacturing process that "starts in the hands, passes through machines, and ends back in the hands," Yanagisawa enlists an integrated approach, with the manufacture of every single part combining the skills of expert craftsmen with modern precision machinery. Yanagisawa saxophones have earned strong acclaim worldwide and are today exported to major markets in North, Central, and South America as well as Australia and Europe.

Yanagisawa's 900- and 990-series soprano and baritone models are introduced.
The first Silver Sonic model (9930 series) is unveiled in Japan, enticing players with the expressive power and beauty of a sterling-silver body in four sizes, from soprano to baritone.

Alto and tenor models are added to the 900 and 990 series, which later evolve into the 900μand 990μseries sporting additional refinements in functionality and ergonomics.