Ninjaken: The Naked Sword is a Japanese original video directed by Yoshikazu Kato. It was released in Japan on June 25, 2007.
The movie is the second release in the Ninja Girl OV series. Kaede Matsushima stars as a female ninja assassin named Murasame who’s tasked with assassinating a rebel lord who has betrayed the Taiko. She suffers a narrow defeat in her attempt, and when she’s outnumbered and wounded she barely manages to escape. Later, she awakens in a strange convent. But this is no ordinary convent, and Murasame soon realizes she must use all her skills to escape her captors.