Shishi-Odoshi

A  bamboo pipe attached to a shaft. The cavity is filled with water until the equilibrium is broken and the tube turns. Originally, this construction was used by farmers to keep unwanted animals away from the harvests. Gradually they began to appreciate the sound, which can be regarded as a symbolism of time and eternity. This shishi-odoshi is from Shisen-dō, and it is said that Jozan, who built the garden, was one of the first people to start enjoying the shishi-odoshi as part of the garden aesthetics. The sound and character of shishi-odoshi varies, another example: https://vimeo.com/311374391