| Sharp X1 5.25in. disk |  Hurry Fox - Yuki no Maou hen | 1986 | Micro Cabin Co. Japan |
| Sharp X1 5.25in. disk | Hydlide - Different Dimension ver. | 1987 | Takeru Co. Ltd Japan |
| Sharp X1 5.25in. disk | Hydlide 3 - The Space Memories Model TED-85 P | 1988 | T&E Soft. Japan |
| Sharp X1 5.25in. disk | Hydlide II - Shine of Darkness Model TET-64 | 1985 | T&E Soft. Japan |
| Sharp X1 5.25in. disk | Hydlide Model TED-46 | 1985 | T&E Soft. Japan |
| Sharp X1 5.25in. disk | Hyper Disk Monitor | 198? | Unknown Japan |
| Sharp X1 5.25in. disk | Ice Climber Model A5-1020 | 1985 | Hudson Soft. Hudson Group Japan |
| Sharp X1 5.25in. disk | Impossible Mission Model X1 C180322-051 | 1985 | Comptiq Japan |
| Sharp X1 5.25in. disk | Irohanihoheto | 1988 | Angel Japan |
| Sharp X1 5.25in. disk | Ishin no Arashi | 1989 | KOEI Co., Ltd. Japan |
| Sharp X1 5.25in. disk | J.B. Harold Jikenbo #1: Final Mystery - Murder Club Model SIRH-16001 | 1986 | Riverhill Soft. Japan |
| Sharp X1 5.25in. disk | J.B. Harold Series #2: Manhattan Requiem - Angels Flying in the Dark | 1987 | Riverhill Soft. Japan |
| Sharp X1 5.25in. disk | Jack - Las Vegas Renzoku Satsujin | 1988 | Takeru Co. Ltd Japan |
| Sharp X1 5.25in. disk | Jesus Model E-G197 | 1987 | Enix, Ltd. Japan |
| Sharp X1 5.25in. disk | Jigoku no Renshuumondai | 1984 | HummingBird Japan |
| Sharp X1 5.25in. disk | Jodan-OS | 198? | Unknown Japan |
| Sharp X1 5.25in. disk | Jotunn Model SIZS-16009 | 1988 | Xain Soft. Japan |
| Sharp X1 5.25in. disk | Junichi Ueda BGM Collection Vol.1 for X1 | 198? | Unknown Japan |
| Sharp X1 5.25in. disk | Junichi Ueda BGM Collection Vol.2 for X1 | 198? | Unknown Japan |
| Sharp X1 5.25in. disk | Kabbala no Himitsu | 198? | Zenryutsu Japan |
| Sharp X1 5.25in. disk | Kage no Densetsu Model NHS-69 | 1987 | Nidecom Japan |
| Sharp X1 5.25in. disk | Kaleidoscope - Loader Set Plus Scenario Set Dai 1 Dan Model SIHB-26006 | 1985 | Hot-B Japan |
| Sharp X1 5.25in. disk | Kamui no Ken Model 150321 | 1985 | Comptiq Japan |
| Sharp X1 5.25in. disk | Karuizawa Yuukai Annai Model E-G149 | 1985 | Enix, Ltd. Japan |
| Sharp X1 5.25in. disk | Kazuo Morita no Shougi | 1985 | Enix, Ltd. Japan |
| Sharp X1 5.25in. disk | King's Knight Special | 1987 | Square Co., Ltd. Japan |
| Sharp X1 5.25in. disk | Kiss of Murder - Satsui no Seppun | 1987 | Riverhill Soft. Japan |
| Sharp X1 5.25in. disk | Knither - Demon Crystal II | 1987 | Dempa Shinbunsha Japan |
| Sharp X1 5.25in. disk | Kohakuiro no Yuigon - Seiyou Karuta Renzoku Satsujin Jiken | 1988 | Riverhill Soft. Japan |
| Sharp X1 5.25in. disk | Kon'yamo Asamade Powerful Mahjong 2 Model S12-G9120-P1 | 1989 | DB-SOFT Japan |
| Sharp X1 5.25in. disk | Kon'yamo Asamade Powerful Mahjong Model S12-G9119-P1 | 1988 | DB-SOFT Japan |
| Sharp X1 5.25in. disk | Konami no Hyper Olympic '84 1 Model S06-G0106 | 1984 | DB-SOFT Japan |
| Sharp X1 5.25in. disk | Konami no Hyper Olympic '84 2 Model S06-G9107 | 1984 | DB-SOFT Japan |
| Sharp X1 5.25in. disk | Kudokikata Oshiemasu | 198? | Hard Japan |
| Sharp X1 5.25in. disk | Kugyokuden | 1986 | Tecno Soft. TechnoSoft Japan |
| Sharp X1 5.25in. disk | Kurayami no Shiten - Bunny Girl Satsujin Jiken Model A5-1023 | 1986 | Hudson Soft. Hudson Group Japan |
| Sharp X1 5.25in. disk | L'empereur Model KN10021020 | 1990 | KOEI Co., Ltd. Japan |
| Sharp X1 5.25in. disk | Labyrinth | 1986 | Pack-In-Video Co., Ltd. Japan |
| Sharp X1 5.25in. disk | Lagrange L-2 - Escape from the Space Colony | 1985 | Compac Japan |
| Sharp X1 5.25in. disk | Laplace no Ma | 1987 | HummingBird Japan |
