Isekai

Isekai is a subgenre of Japanese high fantasy fiction that revolves around a person or people who are transported to and have to survive in another world. In the new world, the person usually gains formidable powers or some other importance that they did not have in the previous world. The transition between worlds may occur through death and reincarnation or through summoning by an object, god, or person in the alternate world. A common setting is a medieval-like world populated with humans, humanoids, and monsters. In a reverse isekai, a person from another world is transported to Earth.