The Rainbow Valley is a location in Doraemon: Nobita in the Robot Kingdom. It is considered a utopia for humans and robots that vowed to live together in peace.
StoryLong time ago, before humans and robots settled down on a barren planet that would later become the Robot Kingdom, a boy and his robotic friend founded and built the Rainbow Valley together. Unlike other places on the planet, the land is rich in vegetation. The story of this miraculous place passed from person to person but was believed by most of the people to be just a legend. The valley was considered sanctuary for human and robot alike who defy the Emotion Removal Law of Queen Jeanne.
Following the escape from the colosseum, Doraemon and friends along with Poko and Kururinpa were forced to fled to the Rainbow Valley even though the only clue of its location was Human-face rock.