In other changes, new father Elliot Dixon moves to No 8, Gareth Evans goes to the blindside flank, and Tongia replaces Patrick Osborne, who has a calf injury.
The bench features a couple of fresh faces.
Southland utility Scott Eade is poised to make his Super rugby debut, and Kurt Baker is set for just his second appearance of the season.
Highlanders: Marty Banks, Waisake Naholo, Jason Emery, Richard Buckman, Ryan Tongia,
Lima Sopoaga, Fumiaki Tanaka, Elliot Dixon, John Hardie, Gareth Evans, Tom Franklin, Alex Ainley, Josh Hohneck, Ash Dixon (captain), Brendon Edmonds. Reserves: Liam Coltman, Daniel Lienert-Brown, Ross Geldenhuys, Joe Latta, Dan Pryor, Scott Eade, Shaun Treeby, Kurt Baker.