Japanese Box Office For May 2003
| Rank | Release | Gross | Theaters | Total Gross | Release Date | Distributor |
|---|---|---|---|---|---|---|
| 1 | X2: X-Men United | $13,167,646 | 437 | $15,253,232 | May 3 | - |
| 2 | Chicago | $11,066,189 | 263 | $27,383,935 | Apr 19 | - |
| 3 | Detective Conan: Crossroad in the Ancient Capital | $9,581,557 | 277 | $24,342,320 | Apr 19 | - |
| 4 | Azumi | $5,431,212 | 254 | $6,668,719 | May 10 | - |
| 5 | The Lord of the Rings: The Two Towers | $4,684,970 | 643 | $65,150,115 | Feb 22 | - |
| 6 | Taxi 3 | $4,641,211 | 212 | $6,395,446 | May 17 | - |
| 7 | 8 Mile | $4,284,386 | 269 | $12,688,916 | May 24 | - |
| 8 | Phone | $4,010,556 | 236 | $6,729,327 | Apr 26 | - |
| 9 | The Hours | $3,821,872 | 209 | $6,451,476 | May 17 | - |
| 10 | Two Weeks Notice | $2,484,917 | 323 | $6,712,861 | May 24 | - |
| 11 | Shin Chan: The Adult Empire Strikes Back | $2,085,615 | 260 | $9,310,002 | Apr 19 | - |
| 12 | Samurai Resurrection | $2,044,839 | 230 | $4,494,239 | Apr 26 | - |
| 13 | About Schmidt | $2,041,345 | 126 | $2,375,660 | May 24 | - |
| 14 | Maid in Manhattan | $1,638,812 | 171 | $1,638,812 | May 10 | - |
| 15 | Dreamcatcher 2006 Re-release | $1,452,021 | 233 | $5,524,970 | Apr 19 | - |
| 16 | Moon Child | $1,263,723 | 134 | $3,713,831 | Apr 19 | - |
| 17 | Reign of Fire | $894,720 | 326 | $2,899,892 | May 17 | - |
| 18 | Catch Me If You Can | $531,408 | 373 | $22,678,989 | Mar 21 | - |
