Answer
The answer is World Wrestling Federation (WWF). Haku, also known as Meng or Tonga Fifita, began his professional wrestling career in the WWF in 1983, where he gained prominence as a powerful and intimidating heel wrestler. He competed in the WWF for several years, engaging in memorable rivalries and capturing the WWF Tag Team Championship twice, before departing in 1992 to pursue opportunities in other wrestling promotions.