Wintersun is an extreme metal band from Helsinki, Finland.
Wintersun was originally created by guitarist Jari Mäenpää as a side-project to folk metal band Ensiferum, for whom he was lead singer and guitarist. In 2003, Mäenpää began culling together songs that he'd been working on since 1995. These songs followed specific themes described by Mäenpää as majestic, "spacy", and melodic. While Mäenpää planned to perform and record each instrument for the first album himself, he still required a drummer. He sent demos to Kai Hahto of Rotten Sound, who agreed to perform the drums.
After obtaining a record deal, Mäenpää scheduled studio time to record the first album. Ensiferum's tour to support their 2004 release was scheduled at the same time, which forced Mäenpää to request time off from the band. The band instead fired him, and Mäenpää was free to go ahead with the production of his self-titled album, Wintersun.