According to billboard JAPAN, AKB48's 53rd single "Sentimental Train" first day sold 1,551,061 copies. Compared with AKB48's last General Election Single #SukiNanda (Approximately 1.4 million copies), the sales is up 10%.
Note: AKB48 53rd single CENTER Matsui Jurina did not participate in AKB48's 53rd single "Sentimental Train" production, because she was taking a hiatus during the production period.
Reference: AKB48 53rd single MVs:
Order AKB48 53rd single on CDJapan: