Kiriichimonji

Kiriichimonji is a Shingu shown only in the prequel series, Akame ga Kill! Zero. It takes the form of a katana. It was wielded by Akame.

History
Kiriichimonji, like all other Shingu, was created four hundred years before the start of the series; the Emperor in charge of their creation had attempted to create weapons that would surpass the Teigu, but failed.

Kiriichimonji was kept hidden in the Empire's secret storage until It was given to Akame by Gozuki. When Akame fought against Gozuki the blade was destroyed and she immediately replaced it with the sword Murasame.

Abilities
It has been stated that wounds inflicted using Kiriichimonji will never heal; otherwise, it has no other abilities.

Trivia

 * Kiriichimonji's name can be interpreted as "cutting in a straight line".