Seiei Jack is a Japanese underground musician and collaborating artist. His exact birth name and date of birth are unknown as he has not made his real name public. Seiei Jack has developed his own musical style with a wide range of musical influences. He combines various genres of music such as rock, hip-hop, electronic, jazz, soul, and R&B to create innovative music. He is known not only for his own musical endeavors, but also for his collaborations with numerous artists. He often collaborates with artists active in the underground scene and continues to create new musical ideas. Seieijack has released a number of albums and his music has received support from many fans. His musical achievements will continue to be noted.

[R.A.A.O] Re-Apocalypse Automatic Orchestra is an experimental trial using internet functions.This project was started in 1984 by Japanese Artist SEIEI JACK (The Joke Project/Re-Apocalypse Project, Monty Cantsin). It consists to join differents artists/musicians in a [R.A.A.O] collaboration program (free Mp3’s internet compilation available on Corebackrecords).This project join all kinds of experimental musics: Noize, Industrial, Breakcore, Ambient, Low-fi
... Every persons who whish to participate has only to add [RAAO] samples & loops to their own musical/audio treatment to create their own vision of Apocalypse in a track.

_The fisrt [RAAO] compilation(35 tracks) was released and published for free by french net-label COREBACKRECORDS