Tokyo's subway system has begun experimenting with playing classical background music on its trains to provide a more comfortable travel experience. <br/><br/>Tokyo Metro Company began the trial today in selected trains between Naka-meguro and Kita-senju stations on the Hibiya Line. <br/><br/>Music pieces such as Debussy's "Light of the Moon" and Chopin's nocturnes are being heard between 10 AM and around 2 PM. The volume is set lower than train announcements.<br/><br/>The idea emerged after the company mistakenly played classical music used for pre-operation checks on a regular train last July. <br/><br/>Word spread on social media, and passengers responded on-line saying they enjoyed the unexpected music.