| NEC PC-9801 Series 5.25in. disk |  Koukou Kyoushi - Sei Erika Jogakuin Hen | 1994 | Wishbone Japan |
| NEC PC-9801 Series 5.25in. disk | Kounai Shasei Special Disk | 199? | Fairytale Japan |
| NEC PC-9801 Series 5.25in. disk | Kounai Shasei Vol. 1 - Yo ni mo H na Monogatari 18 | 1991 | Fairytale Japan |
| NEC PC-9801 Series 5.25in. disk | Kounai Shasei Vol. 2 - Bishoujo Kamen no Nazo - Bishoujo Kamen Kenzan! 18 | 1991 | Fairytale Japan |
| NEC PC-9801 Series 5.25in. disk | Kounai Shasei Vol. 3 - Sailor-fuku Senshi Akko-chan tai Bishoujo Kamen | 1991 | Fairytale Japan |
| NEC PC-9801 Series 5.25in. disk | Kouryuuki Model KN10461010 | 1993 | KOEI Co., Ltd. Japan |
| NEC PC-9801 Series 5.25in. disk | Kousoku Choujin 18 | 1996 | Foster Japan |
| NEC PC-9801 Series 5.25in. disk | Kudokikata Oshiemasu II - Kind Gal's 18 | 1987 | Hard Japan |
| NEC PC-9801 Series 5.25in. disk | Kui Kui Quiz | 199? | Unknown Japan |
| NEC PC-9801 Series 5.25in. disk | Kurayami | 1996 | Melody Japan |
| NEC PC-9801 Series 5.25in. disk | Kurayami no Shiten - Bunny Girl Satsujin Jiken Model L5-1023 | 1986 | Hudson Soft. Hudson Group Japan |
| NEC PC-9801 Series 5.25in. disk | Kuro no Danshou - The Literary Fragment | 1995 | Abogado Powers |
| NEC PC-9801 Series 5.25in. disk | Kuroneko Kan 18 | 1993 | Fairy Dust Japan |
| NEC PC-9801 Series 5.25in. disk | Kuru | 199? | Ascomoid Japan |
| NEC PC-9801 Series 5.25in. disk | Kurumi-chan Ninja | 1995 | Janis Computer Soft., Inc. Japan |
| NEC PC-9801 Series 5.25in. disk | Kurunpa! Pajyama De Ojyama! 18 | 1995 | Circle InferFace Japan |
| NEC PC-9801 Series 5.25in. disk | Kurutta Kajitsu 18 | 1992 | IDES Japan |
| NEC PC-9801 Series 5.25in. disk | Kusuriyubi no Kyoukasho 18 | 1996 | Active Soft. Japan |
| NEC PC-9801 Series 5.25in. disk | Kuubo Senki | 1994 | General Support Japan |
| NEC PC-9801 Series 5.25in. disk | Kuugun Daisentyaku | 199? | SystemSoft Corp. Japan |
| NEC PC-9801 Series 5.25in. disk | Kuunyan no Namida | 1994 | General Soft. Japan |
| NEC PC-9801 Series 5.25in. disk | Kyarukan | 199? | Unknown Japan |
| NEC PC-9801 Series 5.25in. disk | Kyou mo Campus Hana Ranman | 1991 | Computer Brain Japan |
| NEC PC-9801 Series 5.25in. disk | Kyouhaku | 1996 | AIL Japan |
| NEC PC-9801 Series 5.25in. disk | Kyouiku Jisshuu - Joshikousei Maniacs | 1996 | Tetratech Japan |
| NEC PC-9801 Series 5.25in. disk | Kyoukan 2nd S | 199? | Unknown Japan |
| NEC PC-9801 Series 5.25in. disk | Kyoukan K | 199? | Unknown Japan |
| NEC PC-9801 Series 5.25in. disk | Kyoukan Y | 199? | Unknown Japan |
| NEC PC-9801 Series 5.25in. disk | Kyouko no Ijiwaru - Hachamecha Daishingeki 18 | 1994 | PonyTail Soft |
| NEC PC-9801 Series 5.25in. disk | Kyrandia 2 - The Hand of Fate | 1995 | Starcraft, Inc. Japan |
| NEC PC-9801 Series 5.25in. disk | Kyuukyoku Kakutou Shinan | 1994 | Softec Japan |
| NEC PC-9801 Series 5.25in. disk | Kyuukyoku Mahjong - Idol Graphic | 1993 | Dot Kikaku Japan |
| NEC PC-9801 Series 5.25in. disk | Kyuuseishu no Yabou | 199? | Unknown Japan |
| NEC PC-9801 Series 5.25in. disk | L'Empereur Model KN10021030 | 1990 | KOEI Co., Ltd. Japan |
| NEC PC-9801 Series 5.25in. disk | L-est 18 | 1994 | Miamisoft Japan |
| NEC PC-9801 Series 5.25in. disk | Lam-Mal 18 | 1992 | IDES Japan |
| NEC PC-9801 Series 5.25in. disk | Lands of Lore - The Throne of Chaos | 1994 | Starcraft, Inc. Japan |
| NEC PC-9801 Series 5.25in. disk | Laplace no Ma | 1987 | HummingBird Japan |
| NEC PC-9801 Series 5.25in. disk | Laser Squad - Uchuu Kaiheitai | 1993 | C2 World |
| NEC PC-9801 Series 5.25in. disk | Last Armageddon | 1988 | Brain Gray Co., Ltd. Japan |
