Baku (mythology) VS Rokurokubi
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Baku (mythology)
Baku (獏 or 貘) are Japanese supernatural beings that are said to devour nightmares. According to legend, they were created by the spare pieces that were left over when the gods finished creating all other animals. They have a long history in Japanese folklore and art, and more recently have appeared in manga and anime. The Japanese term baku has two current meanings, referring to both the traditional dream-devouring creature and to the Malayan tapir. In recent years, there have been changes in how the baku is depicted.
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Rokurokubi
Rokurokubi (ろくろ首, 轆轤首) is a type of Japanese yōkai (apparition). They look almost completely like humans with one of two differences. There is a type whose neck stretches and another whose head detaches and flies around freely (nukekubi). The Rokurokubi appear in classical kaidan (spirit tales) and in yōkai works. It has been suggested, however, that the idea of rokurokubi may have been created for scaring people into staying in past midnight