Ame-no-Nuboko
Ame-no-Nuboko (天沼矛 or 天之瓊矛 or 天瓊戈; "heavenly jewel-spear"), also known simply by the Kan-on reading Tenkei (天瓊; "heavenly jewel"), is the name given to the hoko (lance) used to raise the primordial land-mass, Onogoro Island, from the sea in Japanese religion. It is often represented as a naginata.