Jana Jonášová with Bendlová and then at the Academy of Performing Arts in Prague with Teodor Šrubař. She made her professional opera debut in 1965 at the Liberec Theatre as Konstanze in Wolfgang Amadeus Mozart's "The Abduction from the Seraglio". That same year she became involved with the Chamber Opera Prague. She remained committed to the Liberec Theatre through 1970 and then joined the National Theatre in Prague where she initially sang minor roles and worked in the opera chorus. In 1973 Jonášová was promoted to principal sopranos at the National Theatre and she quickly became one of the house's most important
June Bronhill Merry Widow", "Orpheus in the Underworld", "Die Fledermaus" and "Rigoletto" at the Sydney Opera House in 1975. In 1976, she decided to move back to Australia permanently. In Australia she appeared in operas such as "Il Seraglio" ("Die Entführung aus dem Serail") and a Victoria State Opera production of Donnizetti's "Maria Stuarda" in July 1976, directed by Robin Lovejoy with a cast including Nance Grant conducted by Richard Divall. She played operetta roles such as Josephine ("H.M.S. Pinafore"), Phyllis ("Iolanthe") and Ruth ("The Pirates of Penzance"). She also had roles in "The Maid of the Mountains", "Call Me Madam", "A