Jo Kondo (b. 1947) emerged as a promising composer while still a student at Tokyo University of the Arts. After graduating from university, in 1973, he began composing using his unique methodology, which he termed "Line Music." Since then, with his refined and distinctive ideas and music, he has consistently remained at the forefront of the global music scene. "Sight Rhythmics," premiered by Aki Takahashi, was originally composed as a chamber piece for five instruments (violin, banjo, steel drum, electric piano, and tuba). In the original version, created from the "Line Music" philosophy of "deriving the entire structure of a piece from a single melodic line," the five instruments sequentially produce sounds, weaving a single melody. Comprising six short movements, this piece features a change in sound for one part in each successive movement. Consequently, a melody almost identical to the previous movement is heard, subtly transforming (only in the final movement do two parts change simultaneously, making it sound as if an entirely different melody emerges). In the piano solo version, all five parts are played with the same timbre, making the melody easier to perceive as a single line. The act of "attentive listening" involves tracing the subtle changes, which the composer himself calls "pseudo-repetitions," within the simple "lines" of sound. It can be said that the essence of Kondo's works, as aimed for by "Line Music," lies precisely in the mechanism that encourages this "attentive listening."