This is the music that Rory hears coming from Carol’s bedroom.
“Big in Japan” is the opening track on the 1999 Tom Waits album, Mule Variations. The album received widespread critical acclaim and was a modest commercial success, going to #30 in the US, #9 in the UK, and most popular in Norway at #1. Ironically, it wasn’t big in Japan, and didn’t chart there. Mule Variations won a Grammy for Best Contemporary Folk Album, and is regarded as one of the greatest albums of all time.