Juken Sentai Gekiranger is the 31st series in Toei's Super Sentai series, a metaseries of Japanese tokusatsu programming. It premiered on February 18, 2007 on TV Asahi's 2007 Super Hero Time programming block with Kamen Rider Den-O, and concluded its airing on February 10, 2008. 

Its footage was used in Power Rangers Jungle Fury.

Plot
Four thousand year ago in Ancient China, a form of martial arts called Beast-Fist was developed. It was created by a man named Brusa Ee, who came to Japan and built the hidden village Beast Origin Village. Jūken is a martial art in which one mimics the abilities of Animal as well as trying to attain spiritual Peace. However, dissent grew among the creator's ten students. Three of them believed that they should use the suffering and hatred harnessed within humans to increase their power, using their power to assume their monstrous forms: the Three Kenma. After Bruse Ee was murdered. the Kenma gathered followers to practice an evil form of the Jūken style known as Rin Jūken Akugata. The other seven students believed that true strength should come from within and engaged their former friends in a great war, ending the fight with a forbidden technique to seal the Kenma power at the cost of losing their human forms in the process, becoming the Seven Kensei. Followers of the Kensei created the Geki Jūken Beast Arts school: the Jūken of justice whose sport discipline enhances the human body with the self-produced positive Qi called "Geki". It is taught by Grand Master Xia Fu, one of the Seven Kensei, using a sports goods company named "SCRTC" as a front. Presently, a fallen student from the Geki Jūken school named Rio turned to the Rin Jūken style. He rebuilds the Rinjū Hall and brings the long-dead Rin Jūken users back to life as kyonshi to collect Rinki, Geki's polar opposite Qi, to resurrect the Three Kenma so that through them, he can become stronger. To fight the new Rinjū Hall, Xia Fu trained two youths: Ran Uzaki and Retsu Fukami. Along with Jyan Kandou, a feral boy raised by tigers in the woods near Jūgenkyō, the Gekiranger team is formed and later joined by two other Geki Jūken users, Gou Fukami Retsu's brother with master of the Geki Jū Wolf-Ken style, and Ken Hisatsu, a genius master of the Geki Jū Rhinoceros-Ken style, to save the world from the Akugata's ambitions. However, an ever greater evil uses the two sides for its plan.

Characters

Cast
Jyan Kandou/Geki Red: Hiroki Suzuki
Ran Uzaki/Geki Yellow: Mina Fukui
Retsu Fukami/Geki Blue: Manpei Takagi
Fake Retsu/Geki Blue: Shinpei Takagi
Gou Fukami/Geki Violet: Riki Miura
Ken Hisatsu/Geki Chopper: Sotaro Yasuda
Rio: Hirofumi Araki
Mere: Yuka Hirata
Infinite Dragon Long: Naoki Kawano
Miki Masaki: Kazue Itoh
Natsume Masaki: Sakina Kuwae
Kentaro Hisatsu: Taro Ishida
Sachiko Hisatsu: Juri Ihata
Dan: Kenji Ohba

Song

Opening theme
 "Juken Sentai Gekiranger"
Lyrics: Nene Oikawa
Composition: Takafumi Iwasaki
Arrangement: Seiichi Kyōda
Artist: Takayoshi Tanimoto with Young Fresh on chorus

Ending theme
 "Tao"
Lyrics: Shoko Fujibayashi
Composition: Katsuki Maeda
Arrangement: Kazunori Miyake
Artist: Ichiro Mizumi with Young Fresh (Chorus)

Characters songs Beginning with Lesson 39 and ending with Lesson 45, the Characters Songs replaced the Jūken Academy segments and "Tao" as the ending theme. The Juken Sentai Gekiranger Character Song Album was released on December 19, 2007, and includes the following songs and karaoke versions of each songs.

 "Susume no Susume" ("Pursuing Future") performed by Jyan Kandou (Geki Red) /Hiroki Suzuki
 "Run" performed by Ran Uzaki (Geki Yellow) /Mina Fukui
 "Just Make it Out" performed by Retsu Fukami (Geki Blue) /Manpei Takagi
 "Wandering Wolf" performed by Gou Fukami (Geki Violet) /Riki Miura
 "Sōiu Koto mo, Aru Daro yo" ("That's it for Me") performed by Ken Hisatsu (Geki Chopper) /Sotaro Yasuda
 "Chigireta Hane" ("The Torn Feather") performed by Mere/Yuka Hirata
 "Kuroki Kodō ~Yuruginai Omoi~" ("Dark Pulse ~Unwearing Desire~") performed by Rio/Hirofumi Araki

Japanese science fiction television series