Hakushu (拍手) refers to the ceremonial clapping practice in Shinto, also known as "Kashiwade."[1] This form of clapping is quiet and gentle, and unlike western applause.[2]
Its origin is unknown. Some people think it holds a Buddhist meaning where the right hand symbolizes Buddha, and the left hand represents all beings, thus signifying the unity of Buddha and all beings.[3]
Due to Shinbutsu-shūgō the origins of this practice are unclear. Shinto and Buddhism have been together so long that many things could come from either.[4] The origin must be ancient though as it is found in the Wajinden describing the Yayoi rituals.[5]
This tradition can be observed in martial arts like Aikido[6][7] and Bujinkan today.[8]