Otsuzumi hourglass-shaped drum.
The ōtsuzumi is one of three drums used in the accompanying ensemble for Japanese Nō (Noh) drama. Its two horseskin heads are strung very tightly, and are heated for at least an hour before the performance. The drum is held near the player's left hip and struck with the fingers of the right hand. Papier mâché thimbles (known as yubikawa) are often worn to protect the fingers.