Ame no Habakiri is a nodachi with the hilt in the form of a trefoil.
Being one of the Meito, Ame no Habakiri is a powerful sword.
Like its sister blade, Ame no Habakiri was forged by a famous blacksmith. It originally belonged to Kozuki Oden, and along with Enma was his primary weapon, both utilized in his Daito Nitoryu sword style.
The Ame no Habakiri (天羽々斬,Ame no Habakiri?, literally meaning "Snake-Slayer of Heaven/Takamagahara") is the most famous Totsuka no Tsurugi, appearing in Japanese mythology as a blade used by the Shinto god Susanoo to slay the legendary monster serpent Yamata no Orochi. "Haba" (羽々,"Haba"?) is an archaic term for "snake."
In Chapter 920 and Episode 893 a flashback of Oden is seen wielding a sword with a different hilt. Whether this is a mistake or another sword is unknown.