Harakiri / scene with music / 1973
Radames / chamber opera / 1975 / 1997
Trois Sœurs <Three Sisters> (三人姉妹) / opera : prologue & 3 seens / 1998
CD•VD
As I Crossed a Bridge of Dreams / sound theatre / 1999
Le Balcon / opera : 10 scenes / 2002
Angels in America / opera : 2 parts / 2004
Lady Sarashina / opera : 1 act / 2007
Love and Other Demons (愛その他の悪霊について) / opera : 2 acts / 2008
Die Tragödie des Teufels / comic-utopian opera : 3 parts / 2010