| Takara e-Kara EC series cart. |  J-Pop Mix Vol. 43 Model EC0083-JPM | 2003 | Takara Co., Ltd. Japan |
| Medal video game | Jackpot Jabara | 2003 | Unknown Korea |
| Slot Machine | Jackpot Safari | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Slot Machine | Jackpot Smile | 2003 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Jackpot Station | 2003 | WMS Gaming, Inc. Chicago, IL, USA |
| Sony PlayStation CD | Jaleco Collection Vol. 1 Model SLPS-03562 | 2003 | PCCW Japan Pacific Century Cyber Work |
| Sony PlayStation 2 disc |  Jampack - Summer 2003 Model SCUS-97280 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation 2 disc | Jampack - Summer 2003 Model SCUS-97281 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation 2 disc | Jampack - Winter 2003 Model SCUS-97312 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Sony PlayStation 2 disc | Jampack - Winter 2003 Model SCUS-97313 | 2003 | Sony Computer Ent. America SCEA CA, USA |
| Dedicated Console | Jara-Ja Land | 2003 | Takara Co., Ltd. Japan |
| Pachislot | Jazz Seven | 2003 | Rick |
| Slot Machine | Jazzy 7 | 2003 | Universal Co., Ltd Tokyo, Japan |
| Slot Machine | Jeff Foxworthy - You Might Be a Redneck If | 2003 | Aristocrat Leisure Industries Pty, Ltd. |
| Video Slot Machine | Jester Magic | 2003 | Konami Gaming, Inc. Las Vegas, NV, USA |
| Nintendo GBA cart. | Jet Grind Radio Model AGB-AJRE-USA | 2003 | T-HQ, Inc. Toy HeadQuarters |
| Pachislot | Jet Set Radio | 2003 | Rodeo Corp. Japan |
| Sega Dreamcast GD |  Jet Set Radio Model HDR-0212 | 2003 | SEGA Corp. |
| Sinclair ZX Spectrum cass. | Jet Set Willy Construction Kit Hb | 2003 | Broadsoft |
| Sinclair ZX Spectrum cass. | Jet Set Willy: FTB Hb | 2003 | Martland, Edward |
| Sinclair ZX Spectrum cass. | Jet Set Willy: Mr Top Hat Hb | 2003 | Aldridge, Nick |
| Sony PlayStation CD | Jikkyou Powerful Pro Yakyuu - Premium-Ban Model SLPM-87216 | 2003 | Konami Corp. Japan |
| Sony PlayStation 2 disc | Jikkyou Powerful Pro Yakyuu 10 - Chou Ketteiban - 2003 Memorial Model SLPM-65445 | 2003 | Konami Corp. Japan |
| Sony PlayStation 2 disc | Jikkyou Powerful Pro Yakyuu 10 taikenban Model SLPM-61053 | 2003 | Konami Corp. Japan |
| Sony PlayStation 2 disc | Jikkyou Powerful Pro Yakyuu 10 Model SLPM-65317 | 2003 | Konami Corp. Japan |
| Nintendo GBA cart. | Jim Henson's Muppets - On with the Show! Model AGB-AZME-USA | 2003 | TDK Mediactive, Inc. |
| Nintendo GBA cart. | Jim Henson's Muppets - On with the Show! Model AGB-AZMP | 2003 | TDK Mediactive, Inc. |
| Nintendo GameCube disc | Jim Henson's Muppets Party Cruise Model DOL-GM9E-USA | 2003 | TDK Mediactive, Inc. |
| Nintendo GameCube disc | Jimmy Neutron - Boy Genius Model DOL-GJNE-USA | 2003 | T-HQ, Inc. Toy HeadQuarters |
| PC/MS-Windows CD | Jimmy Neutron vs. Jimmy Negatron | 2003 | T-HQ, Inc. Toy HeadQuarters |
| Nintendo Famicom cart. | Jing Wei Tian Hai | 2003 | HengGedianzi China |
| Pachislot | Jinjin | 2003 | Luster Co., Ltd. Japan |
| Sony PlayStation CD | Jinx Model SCES-03908 | 2003 | Sony Computer Ent. Europe SCEE |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! King Camel Model SLPS-20317 | 2003 | Sammy Corp. Japan |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! Salaryman Kintarou Model SLPS-20267 | 2003 | Sammy Corp. Japan |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! Salaryman Kintarou Model SLPS-20268 | 2003 | Sammy Corp. Japan |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! Sammy's Collection 2 DX Model SLPS-20339 | 2003 | Sammy Corp. Japan |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! Sammy's Collection 2 Model SLPS-20340 | 2003 | Sammy Corp. Japan |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! Savanna Park DX Model SLPS-20292 | 2003 | Sammy Corp. Japan |
| Sony PlayStation 2 disc | Jissen Pachi-Slot Hisshouhou! Savanna Park Model SLPS-20293 | 2003 | Sammy Corp. Japan |
