"This ocarina will help to awaken a sword..."
- Item description
The Bishamon Ocarina (毘沙門の笛, Bishamon no fue; lit. Bishamon's flute) is an optional item from Onimusha: Warlords. It can be found of the final floor of the Dark Realm, and once Marcellus is beaten for the last time, it can be taken to a room with a door made of claws. Using the ocarina here unlocks said room, which contains the Bishamon Sword.