Kaizo Jingu

JK (ＪＫ（ジェイク）, Jeiku?, pronounced as "Jake") is a supporting character in Kamen Rider Fourze. He is a first year student at Amanogawa High School with a gaudy appearance who is the third member to join the Kamen Rider Club.

Personality
JK acts as an informant to the students of his school who trades secrets for favors. However, he is known to be a coward as he constantly flees from difficult situations and at times uses people in elaborate schemes to get out of these situations. After being helped by Gentaro Kisaragi from the Unicorn Zodiarts, JK becomes more subornative and joins the Kamen Rider Club.

History
On Gentaro's first day, JK gives Gentaro information about the school until running away from Shun Daimonji. During the Queen's Festival, JK learns Gentaro's identity of Kamen Rider Fourze but agrees to keep his mouth shut about it since he wants no trouble. However, being targeted by Fumihiro Nitta, a student he wronged, and seeing the power of the Astro Switches in action personally, JK arranges the theft of the Elek Switch from Gentaro. But the attempt to use the Elek Switch to save his life goes array as JK is held captive by Nitta who allows him to call for help. Though none of his associates come to his aid, Gentaro and the others arrive to save JK. After he learns what friendship really means, JK is made a member of the Kamen Rider Club.