 Returning from Europe in 1928, he continued at Kyoto Imperial University until his appointment as professor at Tokyo Imperial University in 1934. In 1929, he edited Dōgen’s Shōbōgenzō zuimonki. Watsuji received his degree of Doctor of Letters, based on his The Practical Philosophy of Primitive Buddhism in 1932. He wrote as well A Critique of Homer at about this time, a work that was not published until 1946. Also in 1932 he wrote Porisuteki ningen no rinrigaku (The Ethics of the Man of the Greek Polis), which was not published until 1948. In 1936, he completed his Kōshi (Confucius). In 1935, he completed the important Ethics as the Study of Man (Ningen no gaku to shite no rinrigaku), to be followed by his three volume expansion of his views on ethics, Rinrigaku (Ethics) appearing successively in 1937, 1942, and 1949. 