Monstopia A portmanteau of "Monster" and "Utopia," this is literally a "Paradise of Kaiju." Though called a paradise, it is a world of survival of the fittest, much like the Mesozoic era, and its vast wilderness is harsh for humanity. It is said that "rifts in space-time (wormholes)" leading to Monstopia exist all over Earth, which supposedly gave rise to the "Hollow Earth theory." Each area is inhabited by Kaiju adapted to their environment. In addition to Kaiju, many new species of small animals, birds, and insects never seen on Earth also live here, supporting the ecosystem. ● Forest and Jungle Zones Many plants are larger than those on Earth, with some reaching heights of 300 meters. These forests house many relatively small Kaiju (20–30m), including hominid-type Kaiju that prefer fruit and vegetation, as well as bizarre predatory plants and plant-type Kaiju that hunt for blood. Small arboreal animals also thrive here, creating a diverse ecosystem. Some regions contain vast lakes and rivers, which are also home to aquatic Kaiju. ● Plains Zone An area equivalent to Earth's savannahs. 50-meter class Kaiju sprint across the land at speeds exceeding 200 km/h, while 100-meter class giants behave like elephants. There are wide rivers where creatures might be lurking like crocodiles. ● Alpine Zone An area of towering mountain ranges. The presence of updrafts makes it a home for avian Kaiju. Winged predators watch for prey on the ground or in the sky; flying here is a dangerous gamble. ● Arid Zone An area of vast wastelands and deserts. While it seems harsh for life, a rich ecosystem exists here too. It is inhabited by insect Kaiju that build pitfall traps, plant Kaiju evolved from cacti, and herbivores wandering in search of oases. Small reptiles resistant to dehydration are also common. ● Cold and Glacial Zone Frigid areas located at the poles of Monstopia. This is the home of cryo-Kaiju covered in thick fat or fur, alongside small penguin-like birds and seal-type monsters. ● Ocean Zone A vast area covering over 70% of Monstopia. Numerous Kaiju adapted to the sea, such as fish-types and marine reptiles, live here. Beyond Kaiju, it is teeming with countless fish, shellfish, and large marine beasts resembling dolphins or whales, making it the most ecologically rich area. ● Isolated Island Zone Comprised of islands and archipelagos scattered throughout the Ocean Zone. These environments have developed unique ecosystems isolated from the mainland. Due to insular dwarfism, many Kaiju here are smaller, ranging from 10 to 20 meters. ● Cave Zone Areas found in mountains and underground, inhabited by subterranean Kaiju. These also serve as dens for nocturnal monsters; entering them requires significant equipment. Poachers Monstopia is home to many new species unknown to Earth and is believed to be rich in natural resources. Consequently, groups entering for poaching or aliens seeking Kaiju to use as biological weapons frequently infiltrate this world.