Janne has been playing with Brood of Bodom since 1997, and on the year of 2000 created a musical scheme focused on instrumental work, which would only have guest singers on a few selected songs. The first incarnation of Warmen was calm of Janne, guitarist Sami Virtanen and drummer Mirka Rantanen. On the following year, the band saw the adding of Lauri Porra (as of Sinergy) and Janne's guitarist brother, Antti Wirman (from Kotipelto). Their third book, Believe the Information was free in June of 2005.