is a Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese tokusatsu

Tokusatsu

is a Japanese term that applies to any live-action film or television drama that usually features superheroes and makes considerable use of special effects ....

 television series. It was the twelfth installment in the Kamen Rider Series

Kamen Rider Series

The is a metaseries of manga and tokusatsu television programs and films created by manga artist Shotaro Ishinomori. The various Kamen Rider media generally feature a motorcycle-riding superhero with an insect motif who fights supervillains often referred to as...

 of tokusatsu shows. It was a joint collaboration between Ishimori Productions

Ishimori Productions

or is a Japanese production company that develops works created by the late manga artist Shotaro Ishinomori. Such works include Cyborg 009, Kikaider, Inazuman, Skull Man, Ganbare!! Robocon, Voicelugger, the Toei Fushigi Comedy Series, and the Kamen Rider Series....

 and Toei

Toei Company

is a Japanese film, television production, and distribution corporation. Based in Tokyo, Toei owns and operates thirty-four movie theaters across Japan, a modest vertically-integrated studio system by the standards of the 1930s United States; operates studios at Tokyo and Kyoto; and is a...

, and it was shown on TV Asahi

TV Asahi

, also known as EX and , is a Japanese television network headquartered in Roppongi, Minato, Tokyo, Japan. The company writes its name in lower-case letters, tv asahi, in its logo and public-image materials. The company also owns All-Nippon News Network....

 from February 3, 2002 to January 19, 2003. The catchphrase for the series is . In 2009, Ryuki was adapted into the American television series Kamen Rider: Dragon Knight

Kamen Rider: Dragon Knight

Kamen Rider: Dragon Knight is the Daytime Emmy Award-winning American adaptation of the Japanese tokusatsu series Kamen Rider Ryuki, the twelfth installment of the Kamen Rider Series. It was brought to television by Steve and Michael Wang and produced by Jimmy Sprague through Adness Entertainment...

, the first adaptation of a Kamen Rider Series in the United States since Saban's Masked Rider

Masked Rider (TV series)

Masked Rider is an American adaptation of the Japanese television series Kamen Rider Black RX, the ninth in a line of series in the popular Kamen Rider Series franchise. It was produced by Saban and aired on FOX part of the Fox Kids program block from September 16, 1995 to August 31, 1996 and then...

in 1996.
Thirteen were created for thirteen Kamen Riders.