Radiophone Archives

Big band is a large-ensemble style of jazz and popular dance music built around brass, reed, and rhythm sections playing arranged parts. Typical instrumentation includes five saxophones (often doubling clarinet/flute), four trombones, four trumpets, and a rhythm section of piano, guitar, upright bass, and drum set. The music emphasizes swing rhythms, call-and-response between sections, riff-based writing, and dramatic shout choruses, while leaving space for improvised solos. Born in American ballrooms and theaters, big band became the sound of the Swing Era, providing both music for dancing and a platform for sophisticated arranging and orchestration that shaped much of 20th‑century jazz and popular music.

Ryūkōka is an early form of Japanese popular music that, in today’s usage, refers to the mainstream and semi-classical "pop" songs recorded and broadcast from the late 1920s through the early 1960s. While the word once broadly meant "fashionable/popular song" (a sinic reading related to hayariuta) with roots stretching back to premodern popular genres, the modern sense denotes a Showa-era repertoire that blends Japanese melodic sensibilities with Western classical harmony, dance rhythms (waltz, foxtrot, tango), and jazz-era orchestrations. Vocals in archetypal ryūkōka favor a smooth legato line rather than the wide, sobbing kobushi ornaments that later came to typify enka. Ryūkōka’s studio and radio-driven idiom provided the foundation from which postwar Japanese popular music diverged: one current moving toward enka and another toward poppusu/kayōkyoku, setting the stage for later J‑pop.

Swing is a jazz style centered on a buoyant, danceable groove created by a walking bass, four-to-the-bar rhythm guitar, a backbeat emphasis on 2 and 4, and a lilted “swung” eighth-note feel. Typically performed by big bands (saxes, trumpets, trombones, and a rhythm section) as well as small combos, it balances written arrangements with improvised solos. Hallmarks include call-and-response between horn sections, riff-based melodies, shout choruses that build intensity near the end of an arrangement, and rich sectional voicings grounded in blues language and ii–V–I harmonic motion. Tempos range from medium to brisk, serving social dances like the Lindy Hop and Jitterbug. Swing’s expressive phrasing, dance-floor focus, and sophisticated arranging made it the dominant popular music of the late 1930s and early 1940s.