<page_title> List of Oricon number-one singles of 2015 </page_title> <section_title> Chart history </section_title> <table> <cell> "Kuchibiru ni Be My Baby" <col_header> Song </col_header> <row_header> December 21 </row_header> </cell> </table>
"Kuchibiru ni Be My Baby" was number one on the Oricon Singles Chart.