Japanese traditional music(邦楽) is steeped in codified patterns and structural principles, embodied in the cultural concept of “kata（型）”—“form” or “mold.” This study takes musicians’ standardized seating as a window into what I term “the sound of order,” weaving spatial arrangement into the analysis of “kata”. Focusing on four major performing arts—“gagaku（雅楽）”, Noh（能楽）, “bunraku（文楽）”, and kabuki（歌舞伎）—I trace the historical interplay between seating positions and sonic organization, charting how today’s taken-for-granted layouts emerged and evolved, while uncovering an aesthetic trajectory from symmetry to asymmetry in Japanese musical theater.

　Treating stage and seating as microcosms of broader social and political forces, the study follows the longitudinal development of spatial binaries like “left–right” and “center–periphery.” In “gagaku” and Noh, seating reflects the enduring Yin-Yang principle of “left-honored, right-humbled”—a millennium-old trait—alongside a societal shift from centralized to dispersed authority. By examining flexibility within these orders, I show that invariance signals core logic (e.g. the gagaku dadaiko as a symbol of imperial power), while variation registers shifts in power (e.g.the “bunraku”“tayū”“shamisen” seating) or the adaptability of peripheral elements (e.g.kabuki's changing instrumental positions).Drawing on semiotics and related theory, the study theorizes the complex ties between societal systems and artistic spatial norms.