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Hakku Oka was born in 1692 in Harima Province (Hyogo Prefecture), Japan.
Hakku Oka practiced medicine at Nishinomiya before he went to Kyoto and became a Confucian scholar. Wrote many books.
Hakku Oka was a rival of Nankaku Hattori and Nankai Gian, noted composers of Chinese poems. Stopped writing poetry suddenly and turned to Confucianism and studied novels and slang.