Namakura Gatana: Kunoichi-hen is a single-episode ONA from 2017, made as a Kunoichi Chapter follow-up to celebrate the 100th anniversary of Namakura Gatana. The short comes from Akitarou Daichi, a director known for anime shorts, and like many of his personal projects it leans toward the crude side. Expect a brief ecchi piece with a risqué streak.