Tokiko obtained her Master's degree from the Paris Conservatory, specialising in piano, opera and lied accompaniment. She has also studied at the Hannover Hochschule on an exchange program. Among her teachers were Michel Beroff, Erika Guiomar, and Jan Philipe Schulze. She has participated in the European Academy at the festival of Aix-en-Provence and the Weimar opera studio as a repetitor.
Axelle and Tokiko met in 2012 at the Paris Conservatory while Axelle was majoring in vocal performance and Tokiko in vocal accompaniment. They were studying under the instruction of Anne Le Bozec. Since then, they have been working together regularly, performing at various venues, including the Petit Palais in Paris, the Armenian Cathedral of Paris, as well as the House of Lili and Nadia Boulanger in Gargenville, France, where the sisters used to live. In 2014, Axelle and Tokiko were invited to the Music Festival ‘Printemps des Alizes’ in Marrakech, Maroc.