Koyakoya (コーヤコーヤ星 Koyakoya sei) is a planet that makes an appearance in Doraemon: The Record of Nobita: Spaceblazer and its remake, and is inhabited by people from Tokaitokai Planet after the latter was over populated, along with many wild animals. The planet is also known for clean air and low gravity, in turn making the inhabitants unable to stay on Earth longer than a few minutes due to their weaker respiratory system.
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 a host to rare mineral the Galtite Mining Cooperate are after, with them coming up with various plans to blow apart the planet and collecting them from the planet's remains.
