Johansson, 33, appeared in 52 games for Linkoping HC, scoring eight goals and getting 28 assists. In nine seasons in the Swedish league, Johansson has played for Vastra Frolunda HC Gotebo and Linkoping HC, appearing in 440 games, with 86 goals, 167 assists and 226 penalty minutes.
He also played in 54 playoff games, getting 10 goals and 11 assists.
The five-foot-11, 180-pound Johansson also played one season for Langnau in the Swiss Elite League in 2003-2004.
Also Monday, the Blackhawks signed centres Petri Kontiola and Adam Hobson to three-year entry level contracts. Kontiola, 22, was selected in the seventh round of the 2004 draft. Hobson was selected by the Blackhawks in the seventh round of the 2005 draft.