This article is about a/an villain in Sekai Ninja Sen Jiraiya.

Space Ninja Demost (宇宙忍 デモスト Uchuunin Demosuto?): An alien who came to Earth from the faraway planet of the Dark Star (暗黒星 Ankoku-sei?) sometime during the 4th century B.C.


He was imprisoned underground at Mount Kongō by Jiraiya's ancestor, but escapes from his prison as a result of the change in the Earth's crust caused by Jiraishin's resurrection in Episode 37. He begins to plot against Jiraiya in order to use the Pako's powers to obtain all of Earth's resources and return to his home planet. In Episode 41, he obtains the Dark Sword (暗黒剣 Ankoku Ken?), a laser blade equivalent to Jiraiya in terms of strength. His head can detach itself from the rest of his body and float in the air, as well as be restored after being destroyed once. He can attack and bind his enemies with electric shocks, as well as read his opponent's mind.


An image depicting Jiraiya fighting Demost is among those seen when Kasumi MomochiIcon-crosswiki looks up the legendary ninja in the thirty-fourth episodeIcon-crosswiki of Shuriken Sentai NinningerIcon-crosswiki.

Hero Mama League

Demost was planned using mechanic insects to attack the Earth, however, they are all destroyed by HurricaneBlueIcon-crosswiki, DekaYellowIcon-crosswiki and MagiPinkIcon-crosswiki.

Kyuranger vs. Space Squad

KyurangerVSspacepquad Demost

As a member of Genmaku cult group, Demost wants to make Kyuranger's world a gift to Guru Fumein.

However, his plan is disturbed by the KyurangersIcon-crosswiki and he was arrested by Space Sheriffs at the end.


  • Machine Nin Insects (機械忍蟲 Kikai Nin Mushi?)
  • Space Dark Ninja Arts: Shadow Clones (宇宙暗黒忍法・影分身 Uchū Ankoku Ninpō: Kage Bunshin?)


Behind the scenes


In TV series, Demost was voiced by Eisuke Yoda (依田 英助 Yoda Eisuke?) and his suit actor is Naoki Ofuji (大藤 直樹 Ofuji Naoki?). In Hero Mama League and Kyuranger vs. Space Squad, Demost was voiced by Satoshi Hino (日野 聡 Hino Satoshi?) and portrayed by an unknown suit actor.


Space Ninja Demost from Uchu Sentai Kyuranger vs. Space Squad concept

Concept art of Space Ninja Demost from Uchusen Yearbook 2019.


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