<page_title> List of Oricon number-one albums of 2015 </page_title> <section_title> Chart history </section_title> <table> <cell> Tree <col_header> Album </col_header> </cell> <cell> Sekai no Owari <col_header> Artist(s) </col_header> </cell> </table>
Tree (Sekai no Owari album) was number one on the Oricon Albums Chart.