Sosaku Kobayashi (小林 宗作; 15 June, 1893 – 8 February, 1963) was a Japanese eurhythmics and early childhood education researcher and schoolteacher. He was responsible for popularizing eurhythmics in Japanese early childhood education, and he is also known as the headmaster of the innovative elementary school Tomoe Gakuen.
Source: “Sosaku Kobayashi”, English Wikipedia (CC BY-SA 4.0), excerpt