The Australian weightlifter told Loop PNG that it is her "first time to win against her (Dika)’’.
Yamasaki is the new 53kg Pacific Games champion after winning two gold medals and PNG golden girl Dika Toua won one.
Dika failed to lift a bar in the snatch, shocking the nation of fans.
The 53kg champion said she did not see Dika's lift as she was concentrating on her own lift.
"I was sad for Dika at the same time," referring to Dika's failure to make a lift in the snatch.