Popular idol group, Arashi's new double A-side single, "Calling/Breathless" has sold 398,304 copies and topped the charts on its first day, according to Oricon. Compared to their previous releases, Arashi managed to sell the most with Calling/Breathless on its first day.
From 1999 with "A.Ra.Shi" (total sales: 973,310) to their latest, 2013's "Calling/Breathless" Arashi has released 40 singles. 36 of their singles have been #1 for the week.
Previous first day sales:
Your Eyes 209,873
Face Down 250,415
Wild at heart 251,868
Ashita no Kioku/Crazy Moon 230,022
Source
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2Information was gathered from the sources & discography.