- "The Kotetsu is a sword that was used by a famous foreign brigade captain. The blade contains an agent that blinds the enemy. It is made by Black Lotus Co."
- —Details Window
The Kotetsu can be bought post-split on either path. It's the strongest one-handed sword on the Human Path and third strongest on the Nonhuman Path. (This does not include the Holy Sword Gram, which is the strongest one-handed sword in the whole game but can only be found post-game.)