Binzasara (編木 or 板ざさら) is a traditional Japanese percussion instrument used in folk songs, and rural dances. The instrument uses many pieces of wooden plates strung together with a cotton cord. With handles at both ends, the stack of wooden plates are played by moving them like a wave.
I found this instrument while looking for Japanese flutes. It was fun to recreate. Very similar purpose to the wooden ratchets in the western area