According to film critic Otaka Hiroo's tweet, the box office revenue of the K-On!
movie in the first two days was 316.3 million yen. Considering the relatively small number of screens (137 scr), it was a record high number.
Initial box office takings of other movies
The Adventures of Tintin: 319,3 million yen (895 scr)
Gintama: Shinyaku Benizakura-hen
: 200 million yen (90 scr)
: 127 million yen (127 scr)
Evangelion: 2.0 You Can (Not) Advance
: 512.2 million yen (120 scr)
One Piece Film: Strong World
: 485 million yen (188 scr)
Source: Otaka Hiroo's tweet