July 1985
Alain Chapelle & Sweet People

May 1990
Ernst Haefliger (tenor), the jury of the 9th Tokyo Int’l Music Competition (vocal music)

October 1990
Hiroshi Wakasugi with Tonhalle-Orchester Zürich

November 1991
Trio Festivo

March 1992
Trio Festivo

April 1992
Gala Concert by Daniel Kleiner (conductor)

May 1992
Antoine Livio (music critic), the jury of the 7th Tokyo Int’l Music Competition (chamber music)

September 1992
DAVOS International Music Festival Ensemble

March 1993
Trio Festivo

August 1993
Antoine Livio (dance critic), the jury of the 2nd Tokyo Int’l Choreography Competition

March 1994
Trio Festivo

September 1994
DAVOS International Music Festival Ensemble

September 1995
Trio Festivo

March 1997
Trio Festivo

October 1997
Trio Festivo

October 2002
Trio Festivo

July 2003
Speciap Lecture by Alberto Lysy (violinist)

October 2003
The Camerata Lysy Gstaad by the International Menuhin Music Academy

April 2004
Evangelos Sarafianos (pianist)

2018
November Min-On Global Session»Voice» by Simone Felber