Jacks, formed in 1966, were a pioneering Japanese psychedelic rock band known for their avant-garde sound and introspective lyrics. The lineup featured Yoshio Hayakawa (vocals, rhythm guitar), Haruo Mizuhashi (lead guitar), Hitoshi Tanino (bass), and Takasuke Kida (drums). Their 1968 debut album, "Vacant World," showcased a unique blend of folk, jazz, and rock influences, setting them apart from contemporaries. Despite a brief career, Jacks left an indelible mark on Japan's music scene, inspiring future generations of musicians. ([tower.jp](https://tower.jp/artist/237372?utm_source=openai))