Many storytellers across mediums use mythology from their own culture as inspiration in their work, meaning that their fans become familiar with these myths. In anime specifically, fans are incredibly knowledgeable of Japanese mythology, from creatures called Yokai, predominantly the nine-tailed fox, and legends like Momotaro or Kaguya to smaller folktales like the notion that rabbits live on the moon making mochi. These common myths appearing in anime have become something of a welcomed trope for fans, but there's one myth that is far less common but still incredibly impactful.
Source：https://www.cbr.com/anime-uzumaki-symbol-myth-explained/
