| Sharp X68000 Series 5.25in. disk |  Intro Pro 68K | 1991 | Sprite Japan |
| Sharp X68000 Series 5.25in. disk | Irowanioedeo | 1988 | Zenryutsu Japan |
| Sharp X68000 Series 5.25in. disk | Ishido - The Way of Stones | 1991 | ASCII Corp. Japan |
| Sharp X68000 Series 5.25in. disk | Ishin no Arashi Model SJKN13011 | 1990 | KOEI Co., Ltd. Japan |
| Sharp X68000 Series 5.25in. disk | Itekomashi | 199? | Hi Kon Ren Kikaku |
| Sharp X68000 Series 5.25in. disk | J.B. Harold Jikenbo #1: Final Mystery - Murder Club DX | 1988 | Riverhill Soft. Japan |
| Sharp X68000 Series 5.25in. disk | J.B. Harold Series #2: Manhattan Requiem - Angels Flying in the Dark Model SJRH-13001 | 1987 | Riverhill Soft. Japan |
| Sharp X68000 Series 5.25in. disk | Jack Nicklaus' Golf | 1989 | Victor Musical Industries, Inc. Japan |
| Sharp X68000 Series 5.25in. disk | Jack Nicklaus' Golf Course Data Vol.1 '89 | 1989 | Victor Musical Industries, Inc. Japan |
| Sharp X68000 Series 5.25in. disk | Jack Nicklaus' Golf Course Data Vol.2 | 1990 | Victor Musical Industries, Inc. Japan |
| Sharp X68000 Series 5.25in. disk | Jaleck Expert-68K | 1989 | SSL Japan |
| Sharp X68000 Series 5.25in. disk | Jammes | 1993 | Dream Staff |
| Sharp X68000 Series 5.25in. disk | Jan Jaka Jan | 1992 | Elf Japan |
| Sharp X68000 Series 5.25in. disk | Jan Jaka Jan for Adult 18 | 1992 | Elf Japan |
| Sharp X68000 Series 5.25in. disk | Jan Ken Club | 19?? | Dream Project |
| Sharp X68000 Series 5.25in. disk | Jane | 1991 | System House Oh! Japan |
| Sharp X68000 Series 5.25in. disk | Jangou 1 Model X-5023~24 | 1989 | Cross Media Soft Japan |
| Sharp X68000 Series 5.25in. disk | Jangou 2 - Kouchinou Ban Model X-5037~38 | 1990 | Victor Musical Industries, Inc. Japan |
| Sharp X68000 Series 5.25in. disk | Janshin Quest Model GS-165 | 1994 | SPS Japan |
| Sharp X68000 Series 5.25in. disk | Japan 2136 Nihon Gokei | 1990 | Login Soft. Japan |
| Sharp X68000 Series 5.25in. disk | Jastis | 1990 | ASM Japan |
| Sharp X68000 Series 5.25in. disk | Jeena no Taibouken | 1990 | T&H Project |
| Sharp X68000 Series 5.25in. disk | Jesus II Model E-G261 | 1991 | Enix, Ltd. Japan |
| Sharp X68000 Series 5.25in. disk | Jissen Billiards Model SS-31 | 1990 | Pack-In-Video Co., Ltd. Japan |
| Sharp X68000 Series 5.25in. disk | Jissen Igo Taikyoku - Go Kichi-kun | 1988 | GAMU Japan |
| Sharp X68000 Series 5.25in. disk | Joker | 1991 | Birdy Soft. Japan |
| Sharp X68000 Series 5.25in. disk | Joker II | 1992 | Birdy Soft. Japan |
| Sharp X68000 Series 5.25in. disk | Joshikousei Idol Osanazuma Funsenki | 1988 | Zenryutsu Japan |
| Sharp X68000 Series 5.25in. disk | Joshua | 1992 | Panther Soft. Japan |
| Sharp X68000 Series 5.25in. disk | Jotei Senki 1 Queen Edition | 1994 | Linner System |
| Sharp X68000 Series 5.25in. disk | Jotei Senki 2 Legend of Heroines | 1994 | Linner System |
| Sharp X68000 Series 5.25in. disk | Jotei Senki 3 The Queen of Fighters | 1994 | Linner System |
| Sharp X68000 Series 5.25in. disk | Jotei Senki 4 Heroines Forever | 1995 | Linner System |
| Sharp X68000 Series 5.25in. disk | Jumping Simon | 19?? | Tonarinokooringu |
| Sharp X68000 Series 5.25in. disk | Junker Pro-68K | 1990 | Gold Cats Project |
| Sharp X68000 Series 5.25in. disk | Kachoufuugetsu Gaiden | 1993 | Ray Corp. Japan |
| Sharp X68000 Series 5.25in. disk | Kaerimichi wa Kiken ga Ippai 18 | 1990 | DO Corp. Japan |
| Sharp X68000 Series 5.25in. disk | Kage no Soubashi - Shite Honzon | 1989 | KD Office Japan |
| Sharp X68000 Series 5.25in. disk | Kaijuu Daisensou T.D.F. - Kesshi no Genshirou Bouei Sakusen | 1987 | Data West, Inc. Japan |
| Sharp X68000 Series 5.25in. disk | Kaisen Game Daa! | 1990 | Project Team Interrupt |
