This article, Water Jutsu Flute, is property of Nori-sushi-chan.
The Water Jutsu Flute is a bamboo flute made by Yukinoshita that assumes control of her water jutsu via sound waves emitted by it. Unlike actual flutes, this one has twelve holes, one for each hand sign. The curious thing about this flute is that the hand signs are placed in order of their position in the Chinese Zodiac calendar. Only one of these flutes exist and only Yukinoshita can use it because it is specially attuned to her chakra and hers alone.
