Yonin Bayashi made its studio album debut with "Ishoku-Sokuhatsu" in 1974, when all of the members were 20. Their virtuoso performances and experimentation in the studio were exceptional and impressive at the dawn of the Japanese rock business. The sound was a mixture of Pink Floyd, Yes, Deep Purple or Frank Zappa with Hendrix-esque guitar and Procol Harum-like drumming. Yonin Bayashi broke up in 1979. Julian Cope rated "Ishoku-Sokuhatsu" at number 49 in his top 50 Jap rock albums of all time: "From mock Italian harmonies and bossanova rhythms, they'll thrust straight into pure Van der Graaf Generator as played by the first Alice Cooper band, then off into some American guitar epic treks, perhaps with a 13/8 moment thrown in for good measure. This album is progressive pop music in a similar manner to that of solo Todd Rundgren or even the Zombies' experimental LP "Odyssey & Oracle"."