The 23rd volume of the Kimetsu no Yaiba manga already has a total of 2.885 million copies sold, making it the manga with the highest number of sales within the period of one week.
Furthermore, it is worth remembering that the series reached 102.892 million copies sold on December 6th. It is now the second manga series in Oricon's records to sell over 100 million copies. The first series to achieve this feat was One Piece in 2012.
Kimetsu no Yaiba Gaiden volume , which went on sale on the same day as the manga's final volume, sold 859,000 copies and reached second place in sales.
The limited edition of the final volume of the manga that came with a gift card sold 576,000 copies, and then managed to occupy 3rd place in sales, which means that the series dominated the first three weekly sales positions
Source: ANN