The following anime aired in 2003.
| Title | Type | Year | Avg | Rank | Status Eps |
|---|---|---|---|---|---|
| .hack//LIMINALITY | OVA | 2002 | 3 | 2,483 | |
| .hack//Legend Of The Twilight | TV | 2003 | 2.99 | 2,498 | |
| Stratos 4 | TV | 2003 | 2.98 | 2,519 | |
| Mahou Tsukai ni Taisetsu na Koto | TV | 2003 | 2.97 | 2,535 | |
| Someday's Dreamers | TV | 2003 | 2.97 | 2,535 | |
| Leave it to Piyoko! | OVA | 2003 | 2.97 | 2,538 | |
| Di Gi Charat: Leave it to Piyoko! | OVA | 2003 | 2.97 | 2,538 | |
| New Fist of the North Star | OVA | 2003 | 2.97 | 2,542 | |
| Shin Hokuto no Ken | OVA | 2003 | 2.97 | 2,542 | |
| UFO Ultramaiden Valkyrie Special: Bridal Training | OVA | 2003 | 2.96 | 2,554 | |
| Nadia: Secret of the Blue Water Specials | DVD Special | 2003 | 2.95 | 2,568 | |
| RahXephon OVA | OVA | 2003 | 2.95 | 2,573 | |
| Gatekeepers 21 | OVA | 2002 | 2.95 | 2,580 | |
| Nanaka 6/17 Special | DVD Special | 2003 | 2.93 | 2,615 | |
| Overman King Gainer | TV | 2002 | 2.91 | 2,648 | |
| Ninja Scroll: The Series | TV | 2003 | 2.9 | 2,678 | |
| Dragon Drive | TV | 2002 | 2.89 | 2,688 | |
| E's Otherwise | TV | 2003 | 2.89 | 2,699 | |
| Ginga Tetsudou Monogatari | TV | 2003 | 2.88 | 2,702 | |
| Galaxy Railways | TV | 2003 | 2.88 | 2,702 | |
| Omoikkiri Kagaku Adventure Sou Nanda! | TV | 2003 | 2.87 | 2,718 | |
| Sou Nanda | TV | 2003 | 2.87 | 2,718 | |
| Narue no Sekai | TV | 2003 | 2.86 | 2,743 | |
| World of Narue, The | TV | 2003 | 2.86 | 2,743 | |
| Atashinchi | TV | 2002 | 2.85 | 2,766 | |
| Minna no Uta: Egao | Music Video | 2003 | 2.85 | 2,771 | |
| Egao | Music Video | 2003 | 2.85 | 2,771 | |
| Nanaka 6/17 | TV | 2003 | 2.84 | 2,780 | |
| All Purpose Cultural Cat Nuku Nuku Special 1 | DVD Special | 2003 | 2.84 | 2,789 | |
| Hoop Days | TV | 2003 | 2.84 | 2,790 | |
| Dear Boys | TV | 2003 | 2.84 | 2,790 | |
| All Purpose Cultural Cat Nuku Nuku Special 2 | DVD Special | 2003 | 2.82 | 2,829 | |
| Air Master | TV | 2003 | 2.81 | 2,850 | |
| Konjiki no Gash Bell!! | TV | 2003 | 2.79 | 2,878 | |
| Zatch Bell! | TV | 2003 | 2.79 | 2,878 | |
| Happy Lesson OVA | OVA | 2001 | 2.77 | 2,915 | |
| Di Gi Charat Nyo | TV | 2003 | 2.77 | 2,917 | |
| Doraemon (1979) | TV | 1979 | 2.77 | 2,919 | |
| Gad Guard | TV | 2003 | 2.76 | 2,927 | |
| Yami to Boushi to Hon no Tabibito | TV | 2003 | 2.76 | 2,931 | |
| Comic Party Specials | DVD Special | 2003 | 2.76 | 2,939 | |
| Comic Party Revolution OVA | OVA | 2003 | 2.76 | 2,942 | |
| Green Green | TV | 2003 | 2.71 | 3,031 | |
| Knight Hunters Eternity | TV | 2002 | 2.7 | 3,052 | |
| Weiss Kreuz Gluhen | TV | 2002 | 2.7 | 3,052 | |
| IGPX: Immortal Grand Prix (2003) | TV | 2003 | 2.68 | 3,087 | |
| Bokutachi Pichu Brothers: Party wa Oosawagi! no Maki | Other | 2003 | 2.67 | 3,107 | |
| Pokemon: Pichu Bros. in Party Panic | Other | 2003 | 2.67 | 3,107 | |
| Ikkitousen | TV | 2003 | 2.67 | 3,108 | |
| Pokemon Advanced | TV | 2002 | 2.67 | 3,111 | |