Ninkuu: Knife no Bohyou
Japanese title: NINKŪ－忍空－「ナイフの墓標」
Type: Special
Episodes: 1
Source: Manga
Genres: Action, Adventure, Comedy
Studios: Pierrot
Duration: 34 min
Rating: PG-13 - Teens 13 or older

After the war, Fuusuke, Aicho and Touji head to a port town searching for Makoto, the younger sister of an old friend who died in combat and left his knife for her as an inheritance. But when they arrive, they discover that the citizens are being attacked by pirates! Now, the three Ninku must help Makoto defeat Rasen Ryuu and his crew.