Kei

Kei or KEI may refer to:

People

 * Kei (given name)
 * Kei, Cantonese for Ji(姫)
 * Kei, Cantonese for Qi(奇, 祁, 亓)
 * Shō Kei (1700–1752), king of the Ryūkyū Kingdom
 * Kei (singer) (born 1995), stage name of South Korean singer Kim Ji-yeon
 * Princess Kei (Keihime) of Japan
 * Kei Nishikori, Japanese professional tennis player

Automobiles

 * Kei car, a Japanese category of small automobiles
 * Suzuki Kei, a kei car produced by Suzuki between 1998 and 2009
 * Kei truck, a tiny RWD or 4WD pickup truck in Japan

In fiction

 * xxxHolic: Kei, the second season of the anime
 * Sir Kei or Sir Kay, a character in Arthurian legend
 * Kei, a character in Akira media
 * Kei, a character in Dirty Pair media
 * Kei, a character in the Ape Escape universe
 * Kei, a fictional country in Twelve Kingdoms media
 * Kei, a character in Moon Child
 * Kei Nagase, a character in the Ace Combat universe
 * Kei, short for Keiichiro, a character in Wangan Midnight and Wangan Midnight Maximum Tune

KEI

 * Knowledge Ecology International, dealing with issues of intellectual property
 * Knowledge Economic Index, on knowledge economy
 * Keyword Effectiveness Index for a web site
 * Kinetic Energy Interceptor, former planned American missile defense program
 * Keithley Instruments, NYSE symbol

Other uses

 * Kei or Kai Islands, part of the Maluku Islands, Indonesia
 * Kei language
 * kei(x), one of the Kelvin functions
 * Kei school of Buddhist sculpture, Japan
 * Kei Rail, a South African rail project
 * Kei cricket team, South Africa
 * Kei, subgroup of the Kugyō in the Japanese pre-Meiji court
 * Great Kei River, in South Africa
 * a style in Japanese street fashion or a Japanese pop subculture, e.g. Visual kei
 * Kei (ritual gong), a Japanese musical instrument