This is a valuable live recording of the dawn of Japanese jazz-rock. It is a live recording of the concert <Midsummer Night’s Jazz & Rock> held on July 21, 1970 at Hibiya’s open-air concert hall.

It was recorded at about the same time as the masterpiece “Head Rock” by Jiro Inagaki and Soul Media, but here they call themselves Soul Big Media and face a large formation – a total of 12 people.

Original songs such as “Yippy” and “Free Rock” can only be heard in this work, as well as the song “The Ground for Peace”, which is also included in “Head Rock” and arranged by Masahiko Sato.