Himiko is the Queen and ruler of Jipang (or Zipangu) in Dragon Warrior III. The character of Himiko is based on the real Himiko from Japanese history and legend.
By the time the hero arrives in Jipang, the real Himiko has been killed by the Orochi, who in disguise assumes the role of Himiko and orders the villagers to sacrifice young women to appease the Orochi.