Composed at the commission of Katsumi Ooraku. It was premiered at his recital and dedicated to him.

The compositional aim was to re-examine and reconstruct the expressive techniques that 19th-century Romantic music bestowed upon the piano. By doing so, the composer sought to break away from the often mechanical narrative style of contemporary piano pieces. For this reason, five distinct musical fragments, prepared separately, are layered in a mosaic-like fashion, musically expressing a state akin to continuously switching television channels without regard for content. Consequently, it is crucial to perform each section with bold differentiation. Furthermore, the piece extensively employs the effects of the sostenuto pedal, which serves to color each section. The "episodes" contained within the piece are quotations from separate self-composed works, and these sections represent fragmented landscapes viewed through the "window" of this composition. Therefore, these sections should be performed scenically. The image is that of a sonata mosaic, fragmented and scattered. It is a single-movement work, approximately 10 minutes in duration.