The series has been adapted as four different television series: as an award-winning Japanese live-action drama that aired in 2006 followed by a sequel television special that aired in January 2008, as an anime series spanning three seasons with the first broadcast in 2007, the second in 2008 and the third in 2010. Two live-action movie sequels to the Japanese television drama, with the same actors, were produced with release dates of 18 December 2009 and April 2010. In addition, several soundtrack albums of classical music have been released, as well as three video games. A South Korean drama live action adaptation aired on the KBS network in 2014.