She overcame strong opposition from Australia and Fiji. Australian weight lifter got three silver medals while Fiji got three bronze medals.
She lifted 70kg to win the snatch crown ahead of Mary Barter, the first Australian Pacific Games medallist in the 52-year history of the event, maintaining her momentum with a lift of 90kg in the clean and jerk who broke Oceania history.
Those two performances saw her comfortably take the overall honours on a total of 160kg, with Barter winning silver and Fiji's Seruwia Malani taking bronze.
Fiji's Manueli Tulo replicated the performance of Thelma Mea Toua, winning the snatch, clean and jerk and overall events in the men's 56kg as lifts of 107kg and 127kg gave him a total score of 234kg.
Elson Brechtefeld’s second place in the snatch helped him to overall silver, Nauru’s first medal at these Games, and the podium was rounded off by another Fijian, Poama Qaqa.
Following Yamasaki’s historic success, men’s 62kg event was the last medal event of the day and Morea Baru ensured the Papua New Guinea fans went home happy, clinching two of the three medals, including the overall crown with a total of 276kg.
The event also doubled up as the Oceania Weightlifting Championships, which meant each victor was awarded with a second medal, declaring them the Continental champion, as well as Pacific Games winner.[PNGFacts