Dag Syver Arnesen (born 3 May 1950 in Bergen, Norway) is an award-winning Norwegian Jazz musician (piano) with a dozen releases.
Arnesen studied classical piano under Jiri Hlinka at the Bergen Music Conservatory and got a commitment by Den Nationale Scene. Eventually he went to the jazz and played in the 1970s with the Arvid Genius’ orchestra, and led his own Trios, Quartets and Septetter og 13’tets. There were several records under his own name and he is still in the Bergen Big Band. Arnesen has also lived in Osloand played in the Jazz bands Søyr, Orleysa, various groups led by the late international Norwegian guitarist Thorgeir Stubø, vokalist Susanne Fuhr, saxophonists Knut Riisnæs and Odd Riisnæs and orchestra leader Kjell Karlsen. In the Bergen based Sigurd Ulveseth Quartet he has participated on three releases, and Arnesen also led the local Evans Jazzclub.
His melodic style has been compared to Jan Johansson.