William Korwenkoski on tunnettu myös [[Etelä-Pohjanmaa]]lla keskustelua herättäneen Pub Härmän Häjyn perustajana. Hän luopui ravintolatoiminnasta 2003.
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William AJR Korwenkoski is a Finnish singer-songwriter, producer and poetess, who has made several recordings through the years. His first album "Jätkän elämää" came out in 1997, and in 1999 he was the winner of the Finnish drinking song contest. William Korwenkoski's real name is William Arto Juhani Rinne.
As a producer his most remarkable project has so far been Finnhorse - The Proper Horse (Suomenhevonen - kunnon hevonen) album, which was published in 2007 as a part of Finnhorse's 100-year-old celebrations. Arto Juhani Rinne wrote and composed several songs for the album, and also performed on it under his stage name William Korwenkoski.
In South Ostrobothnia Korwenkoski is also know as a founder of pub Härmän Häjy. He quit his career in restaurant business in 2003.
