Concept (概念, countable) refers to a fundamental form and result of the grasping of objects by humans and, more broadly, by living organisms that comprehensively and generally captures multiple rather than so-called individual objects (individuals).
A concept is abstract in the sense that it ignores the detailed differences among individuals and treats them as if they were identical, and it is universal in the sense that its semantic content applies to all the objects it represents.
If the concept of a dog evokes mental images or images of singular, plural, or various breeds of dogs, the concept may also mean mental images or images, and in some cases may be identified with them.
In Puella Magi Madoka Magica, Madoka Kaname's wish as a magical girl makes her the world concept (Goddess Madoka, the principle of the circle) that saves all magical girls from becoming witches.
In The Ending Chronicle, it is the fundamental law of the various worlds, a concept once fought over in wars between worlds. In the present day in the work, in Low-Gear, the only surviving world, various concepts are (degraded) replicated based on conceptual nuclei taken from other worlds.
In works of fiction, such as those in which supernatural powers and magic appear, there is a development in which a specific concept is opposed or given to another concept in order to gain an advantage in battle or to use it as a defense. This is commonly referred to as concept battles. In other words, they take advantage of the fact that certain concepts affect characters and weapons.
In fact, something similar to this is also done in general works such as RPGs. Attributes and types that have advantages and disadvantages, as well as debuffs and buffs, can also be said to be a type of concept battle or concept grant.
Similar or original words have long existed, such as "abomination words", which replace words associated with unfortunate concepts with auspicious words; the personal names of the Ainu people, who dared to protect themselves from bad things by giving the names of impure objects; Narasimha in Indian mythology, who poked holes in demons who seemed invincible; Hel in Norse mythology, who killed a god with an object that would not be recognized as a weapon; and an anecdote in Greek mythology of a hero who defeated a giant that pure gods could not defeat.
For example:
