“Thanks to the Scarlett supporters and community, my family and I felt truly at home,” Pipita said.
“This is something that means a lot to me and I don’t take it for granted.
“By extending my contract, I am demonstrating my confidence and commitment to this club, the staff and the direction we are heading.”
After winning 11 caps for New Zealand, Fifita changed his nationality to Tonga, his native country, ahead of the 2023 World Cup in France.
“It’s fantastic that Vaea has committed,” Scarlets head coach Dwayne Peel said.
“Since he arrived at the club, he has become one of the most loved and world-class players by the supporters.
“He is a special player who can create special moments.
“Just look at the tries he’s scored for us and he’s one of the best lineout forwards in the United Rugby Championship.”