In Japan, music includes a wide array of distinct genres, both traditional and modern.ref>Galliano, Luciana (2002-11-19). Yogaku: Japanese Music in the 20th Century. Scarecrow Press. p. 12. ISBN 978-1-4616-7455-9.</ref> The word for "music" in Japanese is 音楽 (ongaku), combining the kanji 音 on (sound) with the kanji 楽 gaku (music, comfort). Japan is the world's largest market for music on physical media and the second-largest overall music market, with a retail value of US$2.7 billion in 2017.