The Dijitsu (Digit) Stone contains the power and knowledge of Digit dance
In episode 4, it possessed a girl named Akemi. It caused her to fidget constantly, and created a fog over the city that forced others into a depressed fidgeting state as well. Flash Beat and Wink Beat purified her with dance, and this stone came into Hibiki's possession.
According to Breakin, the movements of this Dance Stone can cause a strange inspiration in whoever watches them. However, improper use can instead make it possess the wilder, amplifying any negativity the holder is experiencing.
Dance of Origin
Digit refers to a dance move involving precise and intricate movements of the hand and fingers, with emphasis on the "digits".