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janggu, hourglass-shaped (waisted) drum used in much of Korea’s traditional music. It is about 66 cm (26 inches) long and has two heads stretched over hoops; one of them is struck with a hand and the other with a stick. An early Japanese variant of the janggu is the san no tsuzumi, used in Korean-derived court music (komagaku).

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Tamanna Nangia.