1988-1995 Vomiturition - drums  
1991-1992 Cartilage - drums  
1994 Wings - drums  
1994-2006 Rotten Sound - drums  
1995-1999 The Crescent - drums  
2003-2006 Arthemesia - drums  
2004- Wintersun - drums  
2009- Swallow The Sun - drums  
Studio musician:
2013 Trees Of Eternity - drums  
Live musician:
2007 Swallow The Sun - drums  
2009 Paul Di'Anno - drums  
2013 Rotten Sound - drums  
Guest musician:
1997 Throes Of Dawn - percussion  
2000 Agressor - drums  
2011 Nightwish - additional percussion  

Personal information

Born on: 31.12.1973

Kai Hahto (born in 1973 in Vaasa, Finland) is a Finnish drum-teacher and the drummer of the Finnish metal band Wintersun, and the former drummer of grindcore band Rotten Sound. Beside these, he has played in many other bands, with styles varying from black metal to jazz.

He is an endorser for Meinl cymbals, Pearl drums, Pearl Eliminator pedals, Balbex drumsticks, Roland V-Drums and Finfonic earphones. Formerly Hahto played with a handmade Kumu drumkit.

He recorded the Wintersun album Wintersun as a session drummer with Jari Mäenpää on vocals and multiple instruments. He is currently working with Wintersun on their yet to be released album Time.