Kei
- Dirty Pair
- Great Kei River
- Japanese street fashion
- Ji (surname)
- KIE (disambiguation)
- Kai (disambiguation)
- Kai Islands
- Kei (given name)
- Kei (ritual gong)
- Kei (singer)
- Kei Nishikori
- Kei Rail
- Kei car
- Kei cricket team
- Kei language
- Kei school
- Kei truck
- Keithley Instruments
- Kelvin functions
- Keyword Effectiveness Index
- Kinetic Energy Interceptor
- Knowledge Ecology International
- Knowledge Economic Index
- Kugyō
- List of Ape Escape characters
- List of kingdoms in Twelve Kingdoms
- Moon Child (2003 film)
- Princess Kei
- Qi (surname)
- Shō Kei
- Sir Kay
- Suzuki Kei
- Visual kei
- Wangan Midnight
- Wangan Midnight Maximum Tune
- Yamagata (Akira)