Opener Suzie Bates guided the side to a formidable total of 174 for three with a beautifully paced undefeated knock of 82.
Not to be outshone, Australian import Amanda-Jade Wellington thumped 42 from 21 in a devastating unbroken partnership with Bates.
The pair put on 80 to set up the victory.
Wellington also grabbed a three-wicket bag with some outstanding leg-spin bowling.
Bates helped the Sparks get off to a rapid start.
She found the boundary in each of the opening three overs and looked in good touch.
But the departure of fellow opener Millie Cowan for 13 ushered in a quiet period.
Experienced wicketkeeper-batsman Katie Martin joined Bates at the wicket and the pair put on 55.
But Canterbury wrestled back some control through some tight bowling from Jess Simmons and Missy Banks and eventually Martin cracked.
She got a tad too inventive and was bowled trying to find the boundary with a reverse lap on 23. Put it down to pressure.
Hayley Jensen came and went without making much impact.
But the arrival of Wellington at the crease reinvigorated an innings which had gone flat.
Wellington hit the first two balls she faced for four and teed off in the 16th over with four consecutive boundaries.
The first was a crisp drive, then she pulled out the reverse sweep and middled it.
The next was a little fortunate.
She got an edge which dribbled away to the boundary before clipping the next delivery off her pads for four.
The over cost Canterbury 17 runs and the pain kept coming.
Bates, who had brought her 50 up off 41 balls, abandoned the restraint she had shown and started peppering the boundary as well.
She was dropped twice in the last over but by then the score had ballooned. Otago scored 66 for none off the last five overs.
Canterbury lost two wickets in the power play and that made the difficult chase that much harder.
Wellington struck with her first ball and then fellow Australian Hannah Darlington picked up the scalp of Nat Cox.
The visiting side’s prospects rested on the shoulders of experienced opener Frankie Mackay. But the Canterbury captain could not deliver.
She was bowled by pint-sized off spinner Eden Carson for 15.
The game was all but over.
Wellington picked up two more wickets and also made a cracking throw in from the boundary to help run out Gabby Sullivan.
The chase dawdled to a close at 108 for eight.
At Eden Park Outer Oval, competition leader Wellington overhauled Auckland’s total of 111 for nine with six wickets in hand.
