Yaku may refer to: Yakushima, Japan (屋久島), which could be referred to as Yaku Island Yaku, Kagoshima, Japan (屋久町), a town on the island of Yakushima in Kagoshima Prefecture Yaku, Nepal A specific combination of tiles or cards that increases the value of the player's hand in Japanese Mahjong or Koi-Koi Yaku, an unusual low-pressure system in the far Southeastern Pacific that impacted Ecuador and Peru in March 2023 Yaku (Haida village), an historical village on Haida Gwaii, British Columbia, Canada Yaku: Yūjō Dangi, a 1996 video game for the PlayStation Yaku Yakusen, a character from The 100 Girlfriends Who Really Really Really Really Really Love You