Japanese Box Office For December 2018
| Rank | Release | Gross | Max Th | Opening | % of Total | Open Th | Open | Close | Distributor |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ralph Breaks the Internet | $35,032,284 | - | $4,068,929 | 11.6% | - | Dec 21 | - | Walt Disney Pictures |
| 2 | Dragon Ball Super: Broly | $34,644,279 | 468 | $9,232,351 | 26.6% | 467 | Dec 15 | - | 20th Century Fox International |
| 3 | A Star Is Born | $13,500,000 | 396 | $2,213,631 | 16.4% | 396 | Dec 21 | - | Warner Bros. |
| 4 | Kamen Rider Heisei Generations Forever | $12,465,928 | - | - | - | - | Dec 22 | - | Toei Company |
| 5 | The Grinch | $11,853,493 | 366 | $1,949,279 | 16.4% | 366 | Dec 14 | - | Universal Pictures International (UPI) |
| 6 | Yo-kai Watch the Movie: Forever Friends | $10,336,365 | - | - | - | - | Dec 14 | - | Toho |
| 7 | A Banana? At This Time of Night? | $8,652,004 | - | - | - | - | Dec 28 | - | Shochiku |
| 8 | It Comes | $5,007,430 | - | $1,216,144 | 24.3% | - | Dec 7 | - | Toho |
| 9 | Waiting for Spring | $1,302,229 | - | - | - | - | Dec 14 | - | Independent Films |
| 10 | Pad Man | $732,037 | 35 | $87,786 | 12% | 35 | Dec 7 | - | Sony Pictures Releasing |
