Chisato Nakahara and Asaka Shirai playing at Budrio ocarina festival

Chisato Nakahara and Asaka Shirai playing at Budrio ocarina festival.
The string instrument is in a family that goes under several names: 'chord harp', 'fretless zither' or 'guitar zither'. It is structurally similar to an autoharp but lacking the mechanical action, or the Ukranian bandura / koboza.