List of Oricon number-one albums of 2004

These are the Oricon number one albums of 2004, per the Oricon Albums Chart.

Trivia

 * Number-one album of 2004: Utada Hikaru Single Collection Vol. 1 by Hikaru Utada.
 * Most weeks at number-one: Hikaru Utada with a total of 5 weeks (6 weeks if included their English album Exodus release under their alias Utada).