Please note that this is the Narutopedia's article on the taijutsu used by Kimimaro. If you are looking for the article on the anime-only genjutsu used by Kosuke Maruboshi then you should head to Leaf-Style Willow.
The first of Kimimaro's five dances. To perform this dance, Kimimaro grows several long bone blades from his body for use as weapons. There isn't any set form for the Dance of the Willow. Just like a willow that is shaken by the wind, the opponents attacks are simply parried and countered. Uncharacteristic of a willow, the hardened bones puncture and damage the opponents body. Though he primarily uses two blades grown from the palms of his hands, he also uses several secondary bones grown from his elbows, knees, and shoulders. This dance form is incredibly acrobatic, using spins, charges, and long sweeping slashes to make the strikes more effective and to evade opponents' counter strikes. Kimimaro can also extend his bones to attack his opponents without having to adjust his own movement.