The Punanga Kaveao-skippered side aims to go a notch up in next year’s competition to continue their dominance on the pitch.
Muri overcame Avana/Turangi in an exciting finale on Saturday at the Turangi Oval.
The defending champions won the toss and opted to bat first, but were rattled by the impressive bowling from the challengers.
Muri had lost four wickets for just 24 runs when vice-captain Daena Kataina took the crease and stabilised the team’s run rate.
Kataina smashed 60 runs and formed a strong partnership with captain Kaveao to amass 91 runs.
She stayed on and finished the innings with youngster Jasmanda Tuaputa, who managed 18 runs, for a total score of 162.
Avana/Turangi were fired up and with the hope of dethroning the champions, the side went all out in their bid to overcome the total set by Muri.
And the hosts seemed on track, needing just 11 runs in the final over to win the match.
But Muri youngster Josephine stood in their way and the right-hand slow bowler stepped up to deliver the visitors with the win in the nail-biting end.
She managed two wickets in the final over to ensure Muri retained the title and extended their reign to a third consecutive year.
“She (Josephine) was impressive. She rose to the challenge and delivered us with the winning wickets in the final over,” Kataina said.
“It was a hard-fought win. Avana/Turangi did well but were unable to surpass our total in the final over.”
Muri, who had six youngsters playing for them this season, are keen to continue developing them through to next season.
The side which is dominated by the national reps, is known for producing new talented players who hold potential to represent the country in the future.
“The youngest player in our team this year was a 10-year-old. Muri cricket is all about development, and this group of young and experienced players has worked well together this season.
“We want to continue with this team in next year’s competition with hope of a better performance.”
Kataina thanked the players and supporters for rallying behind the team and guiding them through to a successful title defence.
Muri lost only once in this year’s competition, to minnows Takuvaine.