|Also known as
||Herr Arschstein, I. Ruoja Suruntuoja
||Thrash metal, Black metal, Deathgrind, Progressive metal, Stoner metal
||Vocals, guitar, keyboards
||Relapse Records (with Amorphis), Spinefarm Records
||Ajattara, Amorphis, Mannhai, Shape of Despair, St. Mucus, To Separate the Flesh from the Bones
Pasi Koskinen (born 1972) is a Finnish metal vocalist best known for his work with the band Amorphis from 1995 to 2004. Koskinen also played in Shape of Despair from 2001 to 2010 and in St.Mucus (now Am I Blood), which he founded, from 1992 to 1995. He is currently the vocalist for three active bands: Mannhai, Ajattara (under the alias I. Ruoja Suruntuoja), and To Separate the Flesh from the Bones (under the alias Herr Arschstein).