Namakura Gatana: Kunoichi-hen
Genres: Ecchi
Type: ONA, Episodes: 1
Aired: Nov 8, 2017
Source: Original
Rating: R+ - Mild Nudity
Synopsis:
Namakura Gatana's 100th anniversary has now been honored with a "Kunoichi Chapter" sequel from noted anime shorts director Akitarou Daichi.

Like a lot of his personal pieces, it's a bit crude...

(Source: Crunchyroll)