Johan Reuter studied at the Royal Academy of Music and the Academy of the Royal Theatre in his hometown of Copenhagen. He frequented masterclasses of Ernst Haefliger, Anthony Rolfe-Johnson and Richard Trimborn. Since 1996 he has been a soloist of the Royal Theatre in Copenhagen, where he sings a large repertoire.

In the 2022-23 season Reuter took on the role of Orest from Elektra at the Royal Theatre Copenhagen, Barak from Die Frau ohne Schatten at San Francisco Opera and Friedrich von Telramund from Lohengrin at the Bayerische Staatsoper in Munich, among others.

He starred in the new production of Wagner's Die Meistersinger von Nürnberg as Hans Sachs at the Deutsche Oper Berlin. Johan was part of the exciting line-up to celebrate the Centennial of San Francisco Opera, making his first appearance on the West Coast with Die Frau ohne Schatten.

Highlights from the past seasons include Dead Man Walking, Un ballo in maschera, Cavalleria rusticana/I pagliacci, Scarpia in Tosca [all marking his debut in the roles] in Copenhagen, Barak in Die Frau ohne Schatten in London, New York, Berlin, Zürich and Amsterdam, the title role of Nabucco at the Deutsche Oper Berlin, Braunfels' Jeanne d'Arc at the Salzburger Festspiele, Vec Makropulos at the Met and the Salzburger Festspiele, Wotan in Das Rheingold in Munich and Budapest.

He created the role of Theseus in the world première of Harrison Birthwistle's The Minotaur at the Royal Opera House, Covent Garden where he has also appeared in Elektra, Salome, Wozzeck and The Tsar's Bride. Der fliegende Holländer in Madrid, Berlin and Copenhagen, Le nozze di Figaro at Theater an der Wien and Deutsche Oper Berlin, Macbeth in Lisbon, From the House of the Dead in Paris and Madrid and Così fan tutte in Hamburg. Recent concert appearances include Haydn's Schöpfung and Die Jahreszeiten, Mahler's 8^th Symphony, Rückert-lieder and Das klagende Lied, Beethoven's 9^th Symphony, Brahm's Vier ernste Gesänge, Ein deutsches Requiem, Mozart's Requiem, Berlioz's Romeo et Juliette, Peer Gynt and Michelangelo sonnets by Chostakovich.

He has given song recitals in Copenhagen, Hannover, Frankfurt, Bergen and Madrid. Johan Reuter recorded Tristan und Isolde under Janowski, Kunzen's Holger Danske, Nielsen's Maskarade under Ulf Schirmer (Gramophone Award), Schubert's Winterreise in Danish as well as solo albums with arias by the young Giuseppe Verdi and songs by Richard Strauss, Carl Nielsen and Hakon Børresen.