Pasi Koskinen

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Pasi Koskinen
Also known as Herr Arschstein, I. Ruoja Suruntuoja
Born 1972
Helsinki, Finland
Genres Thrash metal, Black metal, Deathgrind, Progressive metal, Stoner metal
Instruments Vocals, guitar, keyboards
Years active 1992–present
Labels Relapse Records (with Amorphis), Spinefarm Records
Associated acts Ajattara, Amorphis, Mannhai, Shape of Despair, St. Mucus, To Separate the Flesh from the Bones

Pasi Koskinen (born 1972) is a Finnish metal vocalist and musician, currently the vocalist and guitarist of the band Datura Nemesis (2013-), but he is perhaps best known as the vocalist the band Amorphis (1995-2004).[1]

Koskinen was also the vocalist of the bands St.Mucus (which he founded and also was the guitarist), from 1992 to 1994, Ajattara (under the alias I. Ruoja Suruntuoja and was also the guitarist plus did some keyboards) from 1998-2012, To Separate the Flesh from the Bones (under the alias Herr Arschstein and was also the guitarist) from 2004-2006, Shape of Despair from 2001 to 2010 & Mannhai (2005-2009)

Koskinen was also the guitarist for Gomorran Kone.

Koskinen did co-vocal production on Zero Nexus by Shade Empire, and guest vocals on the songs "Vapahtaja" on the album Vuoroveri by Saattue plus the song "Asmodee" on the album Womb of Lilithu by Necrophobic


  1. ^ Hill, Gary. "Biography: Amorphis". Allmusic. Retrieved 11 March 2010.