| Sony PlayStation CD |  Jikkyou Powerful Pro Yakyuu '98 - Kaimakuban Model SLPM-86097~8 | 1998 | Konami Co., Ltd. Japan |
| Sony PlayStation CD | Jikkyou Powerful Pro Yakyuu '98 - Ketteiban Model SLPM-86149 | 1998 | Konami Co., Ltd. Japan |
| Nintendo Super Famicom cart. | Jikkyou Powerful Pro Yakyuu - Basic Ban '98 Model SHVC-AJ5J-JPN | 1998 | Konami Co., Ltd. Japan |
| Nintendo 64 cart. | Jikkyou Powerful Pro Yakyuu 5 Model NUS-NP5J | 1998 | Konami Co., Ltd. Japan |
| Arcade Video game | Jikkyou Powerful Pro Yakyuu EX '98 | 1998 | Konami Co., Ltd. Japan |
| Konami System 573 disc+cart. | Jikkyou Powerful Pro Yakyuu EX Model GX802 | 1998 | Konami Co., Ltd. Japan |
| Nintendo 64 cart. | Jikkyou World Soccer - World Cup France '98 Model NUS-NWSJ | 1998 | Konami Co., Ltd. Japan |
| Sony PlayStation CD | Jikuu Tantei DD 2 - Hangyaku no Apusararu Model SLPS-01533~4 | 1998 | ASCII Corp. Japan |
| Sony PlayStation CD |  Jingle Cats - Love-Para Daisakusen no Maki - Girl meets PlayStation Taikenban Model PAPX-90049 | 1998 | Sony Music Ent., Inc. Japan |
| Sony PlayStation CD | Jissen Pachi-Slot Hisshouhou! Sammy Revolution Model SLPS-01437 | 1998 | Sammy Corp. Japan |
| PC/MS-Windows CD | John Saul's Blackstone Chronicles - An Adventure in Terror | 1998 | Mindscape, Inc. Northbrook, IL, USA 24294 |
| Pachislot | Johnny | 1998 | Net Corp. Japan |
| PC/MS-Windows CD | Johnny Herbert's Grand Prix Championship 1998 | 1998 | Midas Int. Ent. |
| Arcade Video game | JoJo no Kimyou na Bouken | 1998 | Capcom Co., Ltd. Japan |
| Arcade Video game |  JoJo's Venture | 1998 | Capcom Co., Ltd. Japan |
| Slot Machine | Joker | 1998 | GPS Co., Ltd. Game Power System Taiwan |
| Video Slot Machine | Jolly Card | 1998 | Evona Electronic Bratislava, Slovakia |
| Sony PlayStation CD | Jouki Kikansha Unten Simulation - SL de Ikou! Model SLPS-01739 | 1998 | Tomy |
| Handheld game | Joust Model 65-123 | 1998 | Tiger Electronic Toys, Inc. Orchard Mundelein, IL, USA |
| Sony PlayStation CD | Joypad Demo 01 Model SCED-01138 | 1998 | Sony Computer Ent. Europe SCEE |
| Fruit Machine | JPM's Classic | 1998 | JPM International |
| Fruit Machine | JPM's Wizard of Odds | 1998 | JPM International |
| Handheld game | Judge Dredd | 1998 | Tiger Electronic Toys, Inc. Orchard Mundelein, IL, USA |
| Sony PlayStation CD | Judge Dredd Model SLUS-00630 | 1998 | Activision, Inc. Los Angeles, CA, USA 47875 |
| Sony PlayStation CD | Juggernaut - Senritsu no Tobira Model SLPS-01671~3 | 1998 | Tonkin House Japan |
| Sega Dreamcast GD | July Model T-35401M | 1998 | FortyFive |
| Sony PlayStation CD | Junclassic C.C. & Rope Club Model SLPM-86080 | 1998 | T&E Soft. Japan |
| Sega Saturn CD | Jung Rhythm | 1998 | Altron Corp. |
| Redemption mechanical game | Jungle Jive | 1998 | Nova Games Hamburg, Germany |
| Sega Saturn CD | Jungle Park - Saturn Shima Model T-18008G | 1998 | BMG Japan, Inc. Japan |
| Sega Saturn CD | Jungle Park - Saturn Shima Model T-18009G | 1998 | BMG Japan, Inc. Japan |
| Sony PlayStation CD | Jungle Park Model SLPS-01086 | 1998 | Digitalogue Co., Ltd. Japan |
| PC/MS-Windows CD | Jyusen Sayo | 1998 | HiCom Korea |
| Sony PlayStation CD | K.O. - The Live Boxing Model SLPS-01413 | 1998 | Altron Corp. |
| Sony PlayStation CD | K9.5 5 - The Howlywood Premiere Model LSP-907103 | 1998 | Lightspan Partnership, The |
| Sony PlayStation CD | Kaette Kita Pachio-kun - Dream Collection Model SLPS-01384 | 1998 | Coconuts Japan |
| Sony PlayStation CD | Kagero - Deception II demo Model SLUS-90041 | 1998 | Tecmo, Inc. CA, USA |
| Sony PlayStation CD | Kagero - Deception II Model SLUS-00677 | 1998 | Tecmo, Inc. CA, USA |
| Sony PlayStation CD | Kagero - Kokumeikan Shinshou Taikenban Model PAPX-90047 | 1998 | Tecmo, Ltd. Tokyo, Japan |
| Sony PlayStation CD | Kagero - Kokumeikan Shinshou Model SLPS-01421 | 1998 | Tecmo, Ltd. Tokyo, Japan |
