[Machine Translation] An archive series that traces the history of Iruka. The sessions with top-notch musicians from Japan and abroad that have never faded away! Feel the sound of the time, the atmosphere of the time, the energy of the time, and travel back in time to that era! Enjoy the ever-fresh Dolphin Sound! The special disc on Disc-3 contains 5 songs, "Prism", "I won't become an orikko-san", "Hitori Goto", "Kita Gitsune no Uta", "Yume no Hito", a talk collection, and 2 other songs. Included for the first time are songs from "Dolphin Live" that have never been recorded before. Includes live music and talks, and time-travels to Kudan Kaikan on April 24, 1976.