James Kwast (23 November 1852 – 31 October 1927) was a Dutch-German pianist and renowned teacher of many other notable pianists. He was also a minor composer and editor.
Jacob James Kwast was born in Nijkerk, Netherlands, in 1852. After studies with his father and Ferdinand Böhme in his home country, he became a student of Carl Reinecke at the Leipzig Conservatory, and had later studies in Berlin under Theodor Kullak, and Brussels under Louis Brassin and François-Auguste Gevaert. He settled in Germany in 1883, initially as a teacher at the Cologne Conservatory, and later at the Hoch Conservatory in Frankfurt and the Klindworth-Scharwenka (1903–06) and Stern conservatories in Berlin.
He participated in the first performance in England of Brahms’s Piano Trio in C minor, with Carl Fuchs and Carl Deichmann.
Clara Schumann played her last public concert in Frankfurt on 12 March 1891. The last work she played was Brahms's Variations on a Theme by Haydn, in the piano-duet version, with Kwast as her partner.