Gold Kingdom and Water Kingdom (金の国 水の国) is a Japanese manga series written and illustrated by Nao Iwamoto. It was serialized in Shogakukan's Flowers magazine from October 2014 to April 2016, with its chapters collected into a single volume. It tells the story of Princess Saara and Prince Naranbayar, who, in a bid to maintain peace between their rival kingdoms, enter into a pretend marriage and unexpectedly begin to fall in love.
An anime film adaptation produced by Madhouse premiered in Japan in January 2023.