This article is about a/an singer and actor in Kamen Rider Decade.

Gakuto Oshiro (大城 ガクト Ōshiro Gakuto), better known mononymously as Gackt (ガクト Gakuto) is a Japanese musician, singer-songwriter, actor, and author who performed Journey Through the Decade, the opening theme song to 2009's Kamen Rider Decade. He became involved with the series shortly and portrayed Joji Yuki/Riderman in Kamen Rider Decade: All Riders vs. Dai-Shocker.


Gackt began playing the piano at the age of three and was raised on classical and enka music. In high school, he became interested in modern pop rock and played drums in amateur bands. His first professional musical efforts came in the form of being the frontman of a few bands which were successful to some degree.

His solo career was launched in 1999, having released music alongside several popular artists used in various Japanese media.

In 2013, he joined the Indonesian tokusatsu BIMA Satria GarudaIcon-crosswiki, and played NoirIcon-crosswiki in the show.

He is also well-known of providing the voice of his VOCALOID Camui Gakupo (神威 がくぽ Kamui Gakupo), known as Gakupoid, in the VOCALOID series.


  • Journey Through the Decade
  • The Next Decade
  • Stay the Ride Alive
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