Their name was inspired by the self given death of Japanese author Yukio Mishima who, after a failed coup d'état, committed suicide according to ancient Japanese tradition (seppuku or hara kiri) as a gesture of public protest.

Composed of brothers Cortes namely Alex (guitar/programming) and Willie (vocals/drums/bass/programming), Seppuku Paradigm was formed in 2005.

Alex, who is a former member of French collective Downliners Sekt[2]' (The Pledge EP /B:Cuts) also appeared live and in studio alongside Willie for the FARSUCT project (live performances included festivals "Printemps de Bourges", "Transmusicales" and opening act for Buck 65 at "Elysée Montmartre" in Paris).

Their first full original soundtrack was for Franck Vestiel's first film Eden Log, featuring singer Melissa Mars (released in French theaters on Dec 26 2007; bought for the US by Magnet).

In 2008 they composed the score to Pascal Laugier’s very controversial second film Martyrs (out in France September 2008/bought for US release by the Weinstein Company).