Rational Studies

He formulated the jōrigaku (“rationalist studies”) doctrine, which was a precursor to modern scientific and philosophical thought in Japan.

… of Kyushu called his learning jōrigaku (“rational studies”); it contained a dialectical method of thought that, rejecting the fixed “way” of orthodox Neo-Confucianism, saw the world as being constantly in flux. The naturalist Hiraga Gennai, from the Takamatsu domain in Shikoku, rejected the restricted life of the warrior; he became…