<page_title> List of Oricon number-one singles of 2015 </page_title> <section_title> Chart history </section_title> <table> <cell> June 1 <col_header> Issue date </col_header> <col_header> January 5 </col_header> <col_header> January 12 </col_header> <col_header> January 19 </col_header> <col_header> January 26 </col_header> <col_header> February 2 </col_header> <col_header> February 9 </col_header> <col_header> February 16 </col_header> <col_header> February 23 </col_header> <col_header> March 2 </col_header> <col_header> March 9 </col_header> <col_header> March 16 </col_header> <col_header> March 23 </col_header> <col_header> March 30 </col_header> <col_header> April 6 </col_header> <col_header> April 13 </col_header> <col_header> April 20 </col_header> <col_header> April 27 </col_header> <col_header> May 4 </col_header> <col_header> May 11 </col_header> <col_header> May 18 </col_header> <col_header> May 25 </col_header> </cell> <cell> "Bokutachi wa Tatakawanai" <col_header> Song </col_header> <row_header> June 1 </row_header> </cell> </table>
On June 1, Bokutachi wa Tatakawanai was on the Oricon Singles Chart.