The Eredivisie side made attempts to sign the Sweden Under-21 international last summer but could not reach an agreement with Kalmar and have now brought an end to the transfer saga, with the youngster signing a contract with AZ which will keep him at the club until summer 2016.
“I’ve finally arrived," Johansson told the club’s official website after signing the deal.
"Last summer I was happy to join AZ, but Kalmar wouldn’t let me go. Fortunately, it's okay. Now I have time to get used to the Netherlands and AZ's style of play. The attacking style of football here fits me perfectly. I hope to enjoy a lot of success with the club.”
AZ director of football Earnest Stewart insisted that the new signing was one for the future and is great business for the club. “Mattias is a typical AZ player,” Stewart said. “He is a modern defender who plays primarily as a right back.
“He was carefully scouted over a long period of time. We will give Mattias six months to get used to the Netherlands, the culture, the club and our way of playing. That way he will be ready to step into the first team for the new season.”
Johansson played 41 league games for Kalmar FF since breaking into the first team in 2009, scoring one goal for the Swedish outfit.