At the time of composition, I had not yet emerged from my period of apprenticeship (being a fledgling composer fresh out of art university), and this is one of the few pieces from that time included in my list of works. When composing, I was interested in the contrast of sound density between solo and grosso in Baroque concertos, particularly not in the sense of 'concerto' or 'competition' but rather the interplay of densities, and thus I wrote several works on this theme. The title is borrowed from J.S. Bach's Italian Concerto, but the piece is not in ritornello form. From the program notes at the time of the premiere: "Is it not entirely valid that a piece bearing the name 'Concerto' could express the contrast of densities not through the number of instruments, but through the hands of a single pianist?" This contrast is expressed through consonant intervals in the right hand and dissonant intervals in the left hand. Composed on May 4, 1993; premiered on July 4 of the same year at Enokizaka Studio (Minato-ku, Tokyo), commissioned and premiered by Mr. Hiroaki Ooi, to whom it is dedicated." (Hiroyuki Yamamoto)