The three instruments of 'sankyoku' are sometimes used for other schools of shamisen music perhaps because jiuta has a long history as shamisen music and has been the norm for other schools of shamisen music.
地歌は三味線音楽として最も長い歴史を持ち、他の三味線音楽の規範となった部分も多いためか、それ以外の三味線音楽でも時おり「三曲」を扱うことがある。