"Z Densetsu (Owarinaki Kakumei)" (Z伝説～終わりなき革命～, "Z Legend: Neverending Revolution") is the 4th single by the Japanese female idol group Momoiro Clover Z, released in Japan on July 6, 2011.

The single was released in only one edition and had just one song on it. It was released on the same day with Momoiro Clover's 6th single "D' no Junjō" and preceded the release of the band's first album Battle and Romance. The two singles became first the group released under the name of Momoiro Clover Z.

"Z Densetsu (Owarinaki Kakumei)" is a tie-up song for a commercial for Tokyo Joypolis.

The song was produced by Kenichi Maeyamada who had written for Momoiro Clover such trademark songs as "Ikuze! Kaitō Shōjo" and "Coco Natsu". The shout "Zed!" was performed by the "big brother of the anime music genre" Ichiro Mizuki. The male voice summoning the members is Fumihiko Tachiki. When the announcer shouts out "Blue!" (the color of Akari Hayami who left the group in April), the girls freeze in shock and the song stops for a split second.

The music video was released on the DVD that came with the limited edition A of the album Battle and Romance that came out three weeks later, on July 27.

On the cover and in the music video all members are wearing costumes in the style of "sentai heroes", main protagonists of Japanese television series in a genre called "sentai". The sentai genre (the word sentai means literally "squadron") evolves around a team of costumed superheroes fighting villains and includes such popular television shows and franchises as Kyōryū Sentai Zyuranger (remade into Power Rangers for the US), Kamen Rider, Ultraman, Metal Hero. The music video is also reminiscent of sentai films. In the video, the girls use transformation belts to become helmeted fighters looking like sentai warriors, and the Weekend Heroines squadron fights fully armed with a song and a dance. The protagonists of the superhero genre usually have transformation belts (henshin beruto) or some other transformation items (like rings, swords, etc.), which they use to transform into superheroes in armored suits. Momoiro Clover Z transformation belts are clover style.

...
Wikipedia