The first 30 minutes resulted in only one try to Umutahi. Thanks to a quick play of the ball the visitors got on the outside of Te Arawa's defence and scooted 60m to score a converted try.
Umutahi scored again less than a minute after the break as Te Arawa struggled to hold on to the ball.
When the home side did manage to string some sets together they scored a great individual try to Bully Tahuriorangi. It was converted, bringing Te Arawa within four points, but the visitors were in again soon after.
In the other main final of the day Auckland beat Te Mahurihuri 34-14.
Scorers: Umutahi 14 (R Bristow, C Perenara, W Stowers tries; W Stowers 1 con) Te Arawa 6 (B Tahuriorangi try; D Hunuhun-Biddle 1 con) Halftime: 6-0