Murakumogiri is a massive Bisento, fitting the size of Whitebeard, with a striped pole (with the stripes being all plain brown in the anime, but red and yellow in the manga) ending in a spherical pommel, and a large, curved blade attached to the pole with a brass bolster, decorated with a relief of a sea snake, and langets protruding onto the blade itself.
As one of the Sajio O Wazamono Meito, Murakumogiri is one of the most powerful weapons ever created. With Whitebeard's immense power and skill, Murakumogiri was strong enough to clash with Shanks's saber, the Gryphon, which caused the clouds (and even the heavens) to split. Whitebeard usually employed the bisento with both hands, but could also use it proficiently with just one hand. Most of the time he kept it in his right hand, though he occasionally planted its blade in the ground in order to use both of his hands for his Devil Fruit. The naginata could be used in conjunction with his Devil Fruit and Busoshoku Haki to increase the already great damage it could inflict, as well as to neutralize any potential Devil Fruit defense his opponents may possess.
The Murakumogiri is extremely durable, having stopped Akainu's magma attack without melting or receiving any visible damage, though this may have resulted from Whitebeard coating it with Busoshoku Haki. It sustained a two-handed downward swing from giantVice AdmiralJohn Giant as well. Two years after Whitebeard's death, the weapon still showed no signs of decay in spite of two years of weathering the elements, further demonstrating its durability.
Ikkitosen (一騎当千,Ikkitōsen?, literally meaning "Matchless Warrior" or "Mighty Hero"): Whitebeard swings Murakumogiri, sending waves of vibrations at his opponents. This was first used in One Piece: Pirate Warriors . It is one of Whitebeard's special moves and requires one special gauge to perform. In the game's English release, the technique is called One Man Army.
Whitebeard acquired Murakumogiri sometime after his childhood. He was first seen with it during the Great Age of Pirates, when he took control over Fish-Man Island.
Whitebeard died on Marineford two years ago with Murakumogiri in his hand, and it was placed on his grave near Sphinx, with Whitebeard's Jolly Roger and coat hanging from it, and remained there since.
Murakumogiri is the only known Meito that is not a sword.
The name of this weapon is likely derived from that of the legendary Japanese sword popularly known as "Kusanagi-no-Tsurugi" (草薙の剣,"Kusanagi-no-Tsurugi"?lit. "grass-cutting sword"), though it was originally called "Ame-no-Murakumo-no-Tsurugi" (天叢雲剣,"Ame-no-Murakumo-no-Tsurugi"?lit. "heavenly gathering of clouds sword").