- Name: Chakra Enhanced Trench Knives
- Wielders: Asuma Sarutobi, Shikamaru Nara
- Debut (Anime): Naruto Episode 81
- Debut (Manga): Chapter 141
Asuma's knives are in the form of trench knives. Asuma couples these knives with his taijutsu skills to great effect, such that he can take out nine Sound ninja in a matter of seconds. The knives can be infused with elemental chakra to produce added effects. When infused with wind-natured chakra, it easily can pierce through stone. When infused with Shikamaru's shadow chakra, it can immobilize anyone whose shadow it pierces. The knives are currently in the hands of Shikamaru.