Daidarabotchi (ダイダラボッチ?) was a gigantic yōkai in Japanese mythology, sometimes said to pose as a mountain range when sleeping.
Daidarabotchi's size was so great that his footprints were said to have created innumerable lakes and ponds. In one legend, a Daidarabotchi weighed Mount Fuji and Mount Tsukuba to see which was heavier. But he accidentally split Tsukuba's peak after he was finished with it. The Hitachi no Kuni Fudoki, a recording of the imperial customs in the Hitachi Province compiled in the 8th century, also told of a Daidarabotchi living on a hill west of a post office of Hiratsu Ogushi who fed on giant clams from the beach, piling the shells on top of a hill.