The 7th Blues was released as a double album in March 1994 after their successful "PLEASURE LIVE-GYM '93 - JAP THE RIPPER" tour.

The experimentation is also of note, as it follows the familiar pattern of excess that so frequently comes with most double albums in the rock and roll genre, most notably Fleetwood Mac's "Tusk", although nowhere nearly as wild or juxtaposed as Lindsay Buckingham's studio work on said album.

Notable songs include "Jap the Ripper", a previously unreleased song that was played during the aforementioned tour; "Slave to the Night", a re-recording of "Heart wo Nureru Number" from the band's debut album, comprising new English lyrics with an extended intro; "Lady Navigation", a bluesy acoustic version of the 1991 single with all English lyrics.

B'z took the time to experiment with several sounds, and draw upon their influences, including Aerosmith (Kohshi's vocal style is very reminiscent to Steven Tyler in "Don't Leave Me"), The Beatles (heard most directly in "farewell song"), Eric Clapton (The Leslie effected riff for "Queen of Madrid"), Led Zeppelin (most notably in Tak's homage to "Heartbreaker" in the bridge), Jimi Hendrix (intro riff to "SLAVE TO THE NIGHT"), and Van Halen (The intro riff to "JAP THE RIPPER").

Tak's eclectic studio session background, and his musical influences of blues, classical, jazz, pop, and rock are very apparent in the arrangement as well.