SKE48 14th Single [Mirai to wa?] First Day Sales

SKE48's latest single [Mirai to wa?] was released on March 19th selling 273,740 copies on the first day. The single ranked first in the Oricon Daily Charts.

Sales went down for SKE48, [Mirai to wa?] is clearly behind the previous singles. [Sansei Kawaii] was sold 349,835 times on day one and [Utsukushii Inazuma] even 416,341 times.

Those numbers don't look too well compared to SKE48's recent sales. For the past singles, first day sales broke the 300,000 mark clearly and once even surpassed 400,000. Is this because of the AKB48 Group serial releases with all sister groups releasing within a month?