Terada, M. “Umwelt Theory Seen from the Perspective of fūdo Theory: Uexküll, Watsuji, and Imanishi on Nature, Harmony, and Totality”. Sign Systems Studies, vol. 52, no. 3-4, Dec. 2024, pp. 457-84, doi:10.12697/SSS.2024.52.3-4.08.