Wairarapa-Bush signalled early signs of a strong campaign as they travelled to Paeroa to beat Thames Valley 36-9.
And goal kicking was also the difference in Oamaru as North Otago barely held off West Coast 17-16, with a Ben Palmer penalty their only points of the second half.
Results
Wairarapa Bush 36 (James Goodger 2, Nick Olsen, Inia Katia tries; Tim Priest 2 con, 4 pen) Thames Valley 9 (J Te Ruki 3 pen).
Buller 32 (Mitieli Kaloudigibeci, Penijamini Nabainivalu tries; Hagen Schulte 2 con, 5 pen, dg) King Country 20 (Steve Te Moananui, Turanga King, Iliesa Tuvayra tries; Te Hata Wilbore con, pen). HT: 20-13 King Country.
Mid Canterbury 34 (Ashton Tuck 2, Murray Williams, Mavae Tomasi, Ewan Scott tries; Williams 3 con, pen) South Canterbury 17 (Kieran Coll, Matthew Kottier tries; Jason Merrett 2 con, pen). HT: 17-all.
Poverty Bay 60 (Leigh Bristowe 3, Carl Riini 2, Kerehama Barrett, Jake Parangatai, Tamati Samuels, Te Peehi Fairlee tries; Kahu Tamatea 6 con, pen) East Coast 15 (scorers not provided) HT: 26-5.
North Otago 17 (Sala Halaleva try; Ben Palmer 4 pen) West Coast 16 (Andrew Connors, Hugo Torres tries; Torres pen, Nik Cumming pen). HT: 14-10.