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In page Hakushū Kitahara:

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Kitahara moved back to Tokyo in 1926, living at first in Yanaka, then moving to Setagaya in 1928. Kitahara continued to experiment with his style, and continued to be inspired by classical Japanese literature (such as the Kojiki), as seen in his Kaihyo no kumo (Sea and Clouds, 1929). This later work was inspired by a trip from Oita to Osaka by airplane, which was sponsored by the Asahi Shimbun as a publicity stunt. In 1930, Kitahara travelled to Manchuria, and rode on the South Manchurian Railroad. On his return to Japan, he visited Nara.