 For example, the YAS-21 student-grade alto saxophone of the 1970s was superseded by the YAS-23 and YAS-25 saxophones during the 1990s.When manufacture of the YAS-23 and YAS-25 ended they were superseded by the YAS-275, which was in production as of 2010, but was eventually replaced by the YAS-280.In 1900, Yamaha started to manufacture pianos.