A tool used to keep time during Noh and kyōgen practice. It consists of two wooden sticks, with sound produced by striking the clapperboard (hariban) with them. To make hari-ōgi, a folded fan is split in two lengthwise by cutting the pivot and base paper and then wrapping them with Japanese paper or leather. Since the sound changes slightly depending on the tension and the thickness of the glue, performers often make them to their own taste. The stick in the right hand plays the ōtsuzumi part, while the one in the left hand plays the kotsuzumi part. When the taiko drum comes in, both sticks play the taiko part. By performing the shōga chanting and flute parts, all of the chanting and musical accompaniment can be done by one person.