Izanagi and Izanami stood on the Ame no Ukihashi (the Heavenly floating bridge) in heaven (in Takamanohara [the plain of high heaven] in the "Kojiki") and stuck the Ame no nuboko (the heavenly jeweled spear) into the chaos under the heaven to stir with a sound of 'koworo koworo,' then lifted the spear up.
イザナギとイザナミが天（『古事記』では高天原）にある天浮橋に立って天沼矛を混沌とした下界に突き刺し、「こをろこをろ」とかき混ぜて引き上げた。