Koyakoya is a planet that make an appearance in Doraemon: The Record of Nobita: Spaceblazer and its remake. The planet is inhabited by people from Tokaitokai Planet, after the latter was over populated. The planet has clean air as well as low gravity and is also inhabitat by many animals. Unlike Earth, the planet has two moons that switch between rise and fall but when the two rise together, a large flood will occur. The planet also has rare mineral, in which the villains are after by trying to blow apart the planet.