Kachaashii

is a form of festive Okinawan folk dance. The dance is often accompanied by the sanshin and drum.

The dance is executed with the hands in the air, palm flat for the women or curved (or in fists) for the men. The hands alternate in a pulling and pushing, up and down elliptical motion, one hand facing outward and up while the other is facing inward and down. The steps are mostly improvised, but generally consist of a slightly bow-legged stance, alternately lifting and lowering the feet to the rhythm of the music.

The hand movements are notoriously difficult to execute without training.