Originally, this was a set of 70 CDs and 4 contemporary music CDs, "Invitation to Classical Music: A World Masterpiece Collection" commemorating the 120th anniversary of Maruzen's founding, sponsored by PHILIPS, which held the rights. (It cost around ¥200,000 at the time of release.) I searched for the original CD jacket images and created my own index. Of the 70 CDs, I only used about 10, but I checked the appearance (scratches, mold, etc.) and playback of all the CDs, including unopened ones. (While playing them, I also extracted MP3 music compression data (240Kbps: far higher sound quality than FM broadcasting), so I've included all the songs on a single DVD (8GB). Please enjoy them on your mobile devices, etc.