An unknown string instrument. He might be Japanese especially from the panel screens behind.
It looks like there are three strings on top in a group, three in middle, three on bottom.
The 'bow' is a disk turned by a crank on the end. This might be like a band-strap brake drum.
The 'frets' are a row of push buttons similar to an accordion.
Sounds like a Viola maybe. Deep rich raspy sound.
