Highlanders coach Jamie Joseph will leave the franchise at the end of the season to coach Japan.
The move was confirmed at a press conference fronted by Joseph and Highlanders general manager Roger Clark at the team's base in Dunedin this afternoon.
Joseph's deal with Japan will ensure he takes the Cheery Blossoms through until at least the end of the 2019 Rugby World Cup, which it will host.
He and his family will move to Tokyo when the Highlanders' Super rugby campaign ends.
"The decision to move on from the Highlanders was the toughest decision I have ever had to make in my coaching career,'' Joseph said.
"The club, the players and the people I have worked with over the last five years mean a great deal to me and the thought of that coming to an end is tough.''
"While his departure is a blow to the franchise, he will at least get a shot at guiding the team to consecutive Super rugby titles in his sixth and final year in charge.
Despite Japan being scheduled to play two tests against Scotland during the June test window, Joseph will not be involved with the team under after the Super rugby season.
Highlanders chief executive Roger Clark said the franchise was "disappointed'' it could not retain Joseph, but understood his reasons for going.
"We couldn't have asked anymore from Jamie over the six years . . . a lot has been achieved at the Highlanders in that time," Clark said.
"To do what Jamie has done, to set up the systems and the people he has, and also to deliver a championship to the club, is very impressive and we couldn't ask for more.''
Clark said the franchise will take its time and assess all its options before deciding on a replacement for Joseph.
"At this stage, we have got plenty of time. We don't have to replace the coach until the 2017 season.''
Clark confirmed assistant coach Tony Brown would remain on the coaching staff, with his specific role to be determined in time.
Before taking over as Highlanders coach in 2011, Joseph coached Wellington and the Maori All Blacks.
Japan has been looking for a new coach since former coach Eddie Jones replaced Stuart Lancaster in charge of England in November.
