Stage prop used in Kyōgen. Sometimes held by actors playing mountain priests as a Dharma tool for Shugendō ascetic practices, it is a type of snail shell with a mouthpiece attached to the thin end, producing a loud sound when blown, although the actors do not actually blow it on stage. In the Kyōgen play “Kagyū”, there is a scene in which a mountain priest puts a trumpet shell to his waist to prove that he is a snail himself. In the Noh play “Ataka”, when the special staging instruction kaitate-kaitsuke (kaitate) is made for the intermission Kyōgen, a gōriki mountain porter blows his fan as if it were a trumpet shell.