Sixth in its group, Otago will face Waikato in the playoff for 11th and 12th places today.
Auckland plays Hawkes Bay in one semifinal, and Bay of Plenty plays North Harbour in the other.
Otago No 1 Laura Hoskin continued her winning form yesterday, beating Celeste McLean by a convincing 6 and 5 margin.
Hoskin (18) turned six up on her Taranaki opponent but lost the par 5 11th hole.
She responded with a birdie on the following hole and the pair halved the 13th, giving Hoskin the win.
Abby Crawford (16) had a difficult time at No 2, turning four behind Rochelle Keegan and then losing the first two holes on the homeward nine to be out of contention.
At No 3, Susan Greig had a good record going into the final day but was outplayed by Vanessa Bouvet, who won 11, 12 and 13 and eventually beat Greig with four holes to spare.
Sally Shaw (No 4) turned four down and could not get back into the match, losing to Taranaki's Holly Winter on the 14th green.
Wanaka veteran Liz McRae had her second win for the week but it was in a more convincing manner than her win against Tasman on Thursday.
McRae was five up on Joanne McDonald at the turn and won the 10th hole to take a lead of six.
Although she lost the 11th and 12th holes, McRae still held a good lead and shut out her opponent by winning the 13th and 14th holes.
Auckland and North Harbour qualified for the semifinals from division one, while Bay of Plenty and Hawkes Bay-Poverty Bay progressed from division two.
Hawkes Bay-Poverty Bay was the talking point when it delivered a clutch 3-2 win over Manawatu-Wanganui in the final round.
That result meant the black and whites finished second in the group, ahead of Wellington and Manawatu-Wanganui, to book their place in the semifinal for the first time in many years.
Hawkes Bay No 2 Jaime McIvor halved with counterpart Emma Clayton to secure the win. McIvor was all square walking down the last and two-putted from 7m to secure Hawkes Bay's place in the final four.
''I was hitting the ball really well on the closing nine so I was confident,'' McIvor said.
''I didn't know the situation until I had to do my putt, when I realised what was at stake. I was pretty happy to see the putt hit the hole and stop dead because I have been putting pretty badly, so to get the half and the win for the team was awesome.''
Hawkes Bay-Poverty Bay, which is looking to win the title for the first time since 1970, will have its work cut out when it has the unenviable task of trying to stop the Auckland juggernaut.
Auckland completed its rout of division one with a 4-1 drubbing of Waikato in the final round.
The defending champion completed the seven rounds of matchplay with six team points and 27 from a possible 30 individual points.
Brittney Dryland, who was the player of the tournament in 2012, and again has a perfect six from six record this week, said the Auckland team has a special winning culture.
''It is pretty cool to be part of this team, Dryland said.
''We all get on really well, we have a lot of fun both on and off the golf course together and I think that shows.''
Host side North Harbour, the 2010 champion, booked its place in the final four when it halved with Southland, which was enough to qualify when Northland defeated Canterbury 3-2.
No 1 Lita Guo, who has gone undefeated this week at Muriwai, had to halve her match with Southland No 1 Robyn Puller to secure Harbour's place.
Bay of Plenty, the second most successful team in the event's history, halved its match with Wellington to secure top place in division two.
The blue and golds, who last won the title in 2007, have enjoyed a successful week flying beneath the radar.
