Kurokumo Bushido Academy the Ninjutsu school for Traditional Japanese Kuroi ryu Ninjitsu, is teaching this form to students. It is from Ashida Kims "Cloak and Dagger" theme and is called the Hidden Dagger form. This form is now performed by Sensei Arie van den Akker Sensei at ZVCnoord, Krav Maga, Kuroi ryu Ninjitsu at the Kurokumo Bushido Academy