Sōkyoku

Sokyoku is the solo and ensemble repertoire for the koto, a Japanese 13-stringed zither tuned with movable bridges and played with three finger picks (tsume) worn on the right hand. The left hand presses the strings behind the bridge to bend pitches and add ornaments. Melodic lines are largely monophonic, though multiple kotos can play in heterophonic textures. Tempos are typically slow and each note's character — attack, decay, microtonal bend — carries the expression. Titles often reference seasons and natural images: 'Rokudan no Shirabe' (Music in Six Steps), 'Haru no Umi' (Spring Sea).

Yatsuhashi Kengyo (1614-1685), a blind musician working in Kyoto and Edo, is conventionally credited with founding solo koto music as an independent art form, transplanting koto practice from court gagaku to a more accessible domestic and chamber context. His 'Rokudan no Shirabe' remains a foundational piece. The Yamada school (founded by Yamada Kengyo in Edo in the late 18th century) and the Ikuta school (founded earlier in Kyoto) developed parallel performance traditions that survive today. In the 20th century Miyagi Michio (1894-1956) modernized the instrument and repertoire while keeping the language's core principles.

On 'Rokudan no Shirabe' the pleasure is the decay — the koto's plucked tone fades slowly into silence between attacks, and the silence is part of the music. Each of the six sections develops a single melodic idea with cumulative variation. In Miyagi Michio's compositions the harmonic language opens toward Western tonality while the koto's articulation and pacing remain traditional.

Yatsuhashi Kengyo's 'Rokudan no Shirabe' (composed mid-17th century) is the classical entry. Follow with Miyagi Michio works to hear the modern extension. A quiet Japanese-style room or a quiet recorded environment in the early morning or evening suits the music's pacing.

The Yamada and Ikuta schools tune the koto differently and use different finger picks — Yamada-school picks are pointed, Ikuta-school picks are squared. The same piece played in each tradition sounds noticeably different. Koto tuning is changed between pieces to suit the mode of each composition.