This report is not about box office data, but it indirectly confirms the super popularity of Demon Slayer.
According to the announcement issued by AEON Nagoya Chaya on July 20,
Demon Slayer attracted a large number of customers due to its popularity. On July 20, because the production of popcorn could not keep up with the demand and the inventory was difficult to guarantee, it was decided to temporarily stop the sale of popcorn. In addition, the number of customers increased sharply, and the "ice-making" function of the ice machine could not meet the demand, so the supply of ice cubes for drinks was suspended.