In March 1947 she became a founder member of Benjamin Britten's English Opera Group, singing Britten roles at Glyndebourne, Sadler's Wells, Lucerne, Scheveningen, Oslo and Copenhagen as well as the company's home base at Aldeburgh.
Since its foundation the festival features concerts by the Festival's resident orchestra, recitals by soloists and concerts by guest orchestras, including the Berlin Philharmonic, Boston Symphony Orchestra, London Symphony Orchestra, Leipzig Gewandhaus Orchestra, Cleveland Orchestra and the Vienna Philharmonic.
In 1996, he became composer-in-residence at Lucerne Festival, while the 2000 Musica Nova Helsinki festival was dedicated to him.
Onishi’s works have been commissioned by performers and organizations including Mayumi Miyata, Pacific Music Festival, Norfolk and Lucerne Festivals.
Sundance Film Festival | Cannes Film Festival | Lucerne | Toronto International Film Festival | Glastonbury Festival | Edinburgh Festival | Royal Festival Hall | Venice Film Festival | festival | Tribeca Film Festival | Salzburg Festival | Montreux Jazz Festival | Edinburgh Festival Fringe | Oregon Shakespeare Festival | Monterey Jazz Festival | film festival | Bayreuth Festival | Metro Manila Film Festival | Newport Jazz Festival | Locarno International Film Festival | International Film Festival of India | Festival of Britain | Glyndebourne Festival Opera | Coachella Valley Music and Arts Festival | Viña del Mar International Song Festival | Vancouver International Film Festival | Sanremo Music Festival | Aspen Music Festival and School | Tanglewood Music Festival | Fuji Rock Festival |
Vieira has collaborated with student composers in Chicago, NU Contemporary Music Ensemble, Latin Music Festival with US premieres and Lucerne Music Festival Academy in Switzerland under supervision of Pierre Boulez.
The MCO has stable residencies in Ferrara (Ferrara Musica, honorary president: Claudio Abbado), Aix-en-Provence (Festival international d'art lyrique d'Aix-en-Provence), Toblach (Gustav Mahler Musikwochen), Lucerne (Lucerne Festival), Salzburg (Mozartwochen) and Landshut.
He came to Europe in 1972 and held 1st Concertmaster positions in Munich, Stuttgart, the Lucerne Festival Orchestra, the Zurich Symphony Orchestra and the Orchestre de la Suisse Romande in Geneva.