Baku (mythology) VS World tree

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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World tree
The world tree is a motif present in several religions and mythologies, particularly Indo-European religions, Siberian religions, and Native American religions. The world tree is represented as a colossal tree which supports the heavens, thereby connecting the heavens, the terrestrial world, and, through its roots, the underworld. It may also be strongly connected to the motif of the tree of life, but it is the source of wisdom of the ages. Specific world trees include égig érő fa in Hungarian mythology, Ağaç Ana in Turkic mythology, Modun in Mongol mythology, Yggdrasil in Norse mythology, Irminsul in Germanic mythology, the oak in Slavic, Finnish and Baltic, Iroko in Yoruba religion, Jianmu in Chinese mythology, and in Hindu mythology the Ashvattha (a Ficus religiosa).