This is a list of films which have placed number one at the weekend box office in Japan during 2005.
| Weekend End Date | Film | Total Weekend Gross | Notes | |
|---|---|---|---|---|
| 1 | Howl's Moving Castle | $17,796,006 | ||
| 2 | $14,451,460 | |||
| 3 | $12,109,245 | |||
| 4 | Ocean's Twelve | $16,631,674 | ||
| 5 | $16,095,212 | |||
| 6 | The Phantom of the Opera | $14,504,003 | ||
| 7 | The Bourne Supremacy | $14,063,154 | ||
| 8 | $9,279,190 | |||
| 9 | The Phantom of the Opera | $8,946,676 | ||
| 10 | Shark Tale | $10,918,797 | ||
| 11 | Rockman EXE & Duel Masters | $12,708,498 | ||
| 12 | National Treasure | $11,666,763 | ||
| 13 | $9,488,042 | |||
| 14 | $8,686,572 | |||
| 15 | $7,384,173 | |||
| 16 | Constantine | $14,859,234 | ||
| 17 | $12,565,553 | |||
| 18 | $13,499,378 | |||
| 19 | Koshonin Mashita Masayoshi | $13,575,874 | ||
| 20 | $11,052,795 | |||
| 21 | $9,755,250 | |||
| 22 | $9,006,342 | |||
| 23 | The Forgotten | $1,339,280 | ||
| 24 | Sengoku Jieitai 1549 | $13,225,26 | ||
| 25 | Batman Begins | $11,575,136 | ||
| 26 | War of the Worlds | $20,191,820 | ||
| 27 | $32,216,158 | |||
| 28 | $16,028,098 | |||
| 29 | $11,356,792 | |||
| 30 | $14,226,192 | |||
| 31 | $9,719,118 | |||
| 32 | $16,064,791 | |||
| 33 | Madagascar | $11,568,323 | ||
| 34 | $9,199,454 | |||
| 35 | The Suspect Muroi Shinji | $9,213,992 | ||
| 36 | Charlie and the Chocolate Factory | $21,218,964 | ||
| 37 | $15,344,119 | |||
| 38 | $15,344,119 | |||
| 39 | $11,590,356 | |||
| 40 | $10,774,600 | |||
| 41 | Stealth | $2,134,210 | ||
| 42 | Charlie and the Chocolate Factory | $7,929,885 | ||
| 43 | Corpse Bride | $6,913,660 | ||
| 44 | A Moment to Remember | $9,485,907 | ||
| 45 | The Brothers Grimm | $10,534,554 | ||
| 46 | Always Sanchōme no Yūhi | $8,158,913 | ||
| 47 | $5,816,461 | |||
| 48 | Harry Potter and the Goblet of Fire | $15,677,146 | ||
| 49 | $16,548,704 | |||
| 50 | $16,842,314 | |||
| 51 | $12,568,150 | |||
| 52 | $16,755,802 |
Web site: Japanese Weekend Box Office Index, 2005 . . Box Office Mojo, LLC . 2010-02-24. Note: Click on the relevant weekend to view specifics.