Cowboy Bebop
Cowboy Bebop takes its name from a jazz term on purpose. Bebop is the improvisational, boundary-breaking style of jazz pioneered by musicians like Charlie Parker and Dizzy Gillespie, and director Shinichiro Watanabe built the whole show around that same idea: a genre-blending mix of noir, western, science fiction, and slapstick comedy that refuses to sit still in one category, the same way bebop itself refused to sit still inside traditional jazz structure.
The soundtrack isn't set dressing, it's practically a co-lead. Composer Yoko Kanno formed an actual working band, The Seatbelts, specifically to score the series, and the music swings between hard bop, blues, and orchestral pieces episode to episode depending on the tone. Few anime scores are discussed as seriously as standalone music as Cowboy Bebop's.
It aired in Japan in 1998, but several episodes were pulled from the original broadcast over violent content and only aired later in an uncut run. The show's real breakout audience came in 2001, when Cartoon Network's Adult Swim block picked it up and introduced it to a huge English-speaking audience who'd never seen anime treated with that kind of cinematic seriousness on American television before.
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