Kabane Katana

The Kabane Katana is Kurusu's sword. Originally a regular katana, after being broken it was reforged with Kabane iron by Ikoma.

History
After Kurusu broke his katana attempting to pierce the heart of a Wazatori. Ikoma took his broken sword and reforged it, coating the sword with the iron encasing the hearts of Kabane, making it more durable. This makes the sword capable of easily piercing Kabane hearts, as Kurusu demonstrated single-handed.