Ioane, of Te Rārawa, was granted an early release from the Highlanders with a year remaining on his contract.
He's signed a one year deal with the Chiefs for the 2022 Super Rugby Pacific campaign.
The 26-year-old, who holds one All Blacks Test cap to his name, said he is excited to link up with the Chiefs.
"I've loved my time with the Highlanders and am grateful for everything they've done for me" said Ioane.