His latest injury (a dislocated shoulder) which occurred during their clash with the Reds last year has seen the 104kg centre go under the surgeon's knife once again.
Last week, Kahui had a "clean-up" operation on his shoulder to remove scar tissue. The procedure meant the 17 test All Black, won't be available for the Chiefs' first Super Rugby match against the Highlanders in Dunedin
Chiefs' coach Dave Rennie respected Kahui's decision to leave the Super Rugby franchise.
"Richard has been an outstanding member of the Chiefs family, having played over 50 games for us. He has an opportunity to set himself up for his future and we are fully supportive of what he is doing and hope to get him back for 2015."
Kahui made his debut for the All Blacks in 2008 and has scored 10 tries. He told The Daily Post the latest injury had been frustrating but he was keen to help his side go back-to-back before he left.
"I felt like last year was probably the first year I played decent rugby for the Chiefs during the Super Season so it was pretty disappointing the way it ended. I'd just really love to get a good start."
The Chiefs head to Mangatainoka to play the Hurricanes tomorrow in their last pre-season fixture. They play the Highlanders in Dunedin on February 22 in the opening round of Super Rugby.