| Sega Mega Drive cart. |  Jurassic Park Model 1056-50 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. |  Jurassic Park Model 2511 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega CD | Jurassic Park Model 4410 | 1994 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-CD | Jurassic Park Model 4411-06 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-CD | Jurassic Park Model 4411-09 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-CD | Jurassic Park Model 4411-18 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-CD | Jurassic Park Model 4411 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | Jurassic Park Model 9030 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Jurassic Park Model G-3229 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Jurassic Park Model G-4109 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-CD | Jurassic Park Model G-6038 | 1994 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Juuouki Model 317-0065 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Juuouki Model G-4001 P | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega SC-3000 cart. | Kagaku - Gensokigou Master Model E-107 | 1983 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Kaisen Channel Mars TV | 1999 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Pico game | Kaitou Saint Tail - Saint Tail to One, Two, Three! Model HPC-6035 | 1996 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Kaitou Saint Tale Model G-3382 | 1996 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Kanzen Chuukei Pro Yakyuu Greatest Nine | 1995 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Pico game | Kawaii Nakama wo Sodate you! 3-tsu no Shippo Model HPC-6055 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Coin-op Misc. game | Ken Shimura no Daijoubuda - Roulette Man | 1992 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mark III cart. | Kenseiden Model G-1358 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | Kenseiden Model MK-7013-50 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Kenyuu Densetsu Yaiba Model G-3346 | 1994 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Pico game | Kero Kero Keroppi no Harikiri Undoukai Model HPC-6006 | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Pico game | Keyboard Pico 2 Set with Sawatte Miyou! Yoiko no Hajimete Keyboard | 1997 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Kid Chameleon Model 1010-50 | 1992 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-Tech cart. | Kid Chameleon Model 60 | 1992 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Kidou Senkan Nadesico - The Blank of 3 Years | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Kidou Senkan Nadesico - Yappari Saigo ha Ai ga Katsu ? | 1997 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Gun game | Killer Shark | 1972 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Kinetic Connection Model G-3401 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Kishin Douji Zenki Model G-3373 | 1995 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Meganet pack. | Kiss Shot | 1992 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Kisuishou Densetsu Astal Model GS-9019 | 1995 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Dreamcast GD | Kiteretsu Boy's Gangagan Model HDR-0064 | 2000 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Dreamcast GD | Kiteretsu Boy's Gangagan Model HDR-0068 | 2000 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Pico game | Kiteretsu Daihyakka - Edo ni Itte Kiteretsu Saisamaniau Nari Model HPC-6015 | 1994 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Pinball | Knockout Blow | 1978 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. |  Knuckles in Sonic 2 | 1994 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | KO Punch | 1981 | SEGA Enterprises, Ltd. Tokyo, Japan |
