Japanese taiko drums, while having antecedents in Chinese and Korean drums, have been developed into a wide range of percussion instruments that are used in both Japanese folk and classical musical traditions. Taiko, in general, are stick percussion instruments. With the exception of the kotsuzumi and ootsuzumi, all taiko are struck with drumsticks. They have heads on both sides of drum body, and a sealed resonating cavity. Taiko are also characterized by a high amount of tension on the drums heads, with a correspondingly high pitch relative to body size. This high tension likely developed in response to Japan's wet and humid summers when most festivals take place. Many taiko are not tunable, and a drum with high head tension would counteract the slacking effects of humidity.