Japanese Box Office For May 2021
| Rank | Release | Gross | Max Th | Opening | % of Total | Open Th | Open | Close | Distributor |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Hell's Garden | $5,450,978 | - | $1,096,206 | 20.1% | - | May 21 | - | Warner Bros. |
| 2 | Beautiful Lure: A Modern Tale of Painted Skin | $5,239,977 | - | - | - | - | May 14 | - | Nikkatsu |
| 3 | A Morning of Farewell | $5,075,369 | - | $1,362,403 | 26.8% | - | May 21 | - | Toei Company |
| 4 | Cruella | $4,804,646 | - | $789,039 | 16.4% | - | May 27 | - | Walt Disney Studios Motion Pictures |
| 5 | Fate/Grand Order The Movie Divine Realm Of The Round Table: Camelot Paladin; Agateram | $2,085,581 | - | - | - | - | May 15 | - | Aniplex |
| 6 | The Gentlemen | $904,055 | - | - | - | - | May 7 | - | Kino Films |
| 7 | Father | $432,712 | - | - | - | - | May 14 | - | Showgate |
| 8 | Hokusai | $352,371 | - | $251,801 | 71.5% | - | May 28 | - | - |
| 9 | Unhinged | $240,584 | - | $167,557 | 69.6% | - | May 28 | - | Kadokawa |
| 10 | Love at Second Sight | $175,378 | - | - | - | - | May 6 | - | Happinet |
