Kusanagi is a two-handed sword in NieR RepliCant and NieR Gestalt (NIER). It is the default two-handed sword, in Nier's possession automatically halfway through the game. How or when he acquired it in those five years is unknown.
A man whose fiancée was spirited away by an eight-headed beast used this sword to smite his foe.
The shield fastened to the wall gathered dust. The sword kept within its sheath rusted. I forgot skills that I no longer use. I left my trained body as it is. I lost my judging heart.
I thought that this could end without me telling anyone. I saw others’ violence, and pretended not to see. I gave up since I couldn’t change it anyway. I thought that I couldn’t go against great strength.
I laughed at the hearts that believed. I laughed at them for being worthless. That’s how I ran from everything. I gave up, thinking that it was impossible. Foolishness and ugliness brought me much lament. I lost my life’s meaning.
I lost sight of my treasured person. I could not keep believing in their gentleness. I could not save them from heart-tearing sorrow. I forgot the courage needed to protect mundane happiness. Because I thought that these words will never reach them.
- Kusanagi takes its name from one of the Japanese Imperial Regalia. Its full name is the "Kusanagi no Tsurugi", but it is also known as "Ame no Murakumo".