The two real soundboard tracks from the September 29, 1971 Osaka performance of Led Zeppelin, which shook the industry, "BLACK DOG" and "FRIENDS", which was performed for the first time on that day, are re-released in a Japanese paper jacket. There are still fans who don't know about it, so this is an educational item that is filled with the desire to let more Zepp fans know that it is a real soundboard that is different from the past.
