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Daidō was the third wrestler from Senshu University to achieve sekitori status, following already retired Musoyama and Katayama, the latter of whom was also from the same stable.
Born in Imari, and a graduate of Fukuoka Middle School (present-day Fukuoka Prefectural Fukuoka High School), he studied law first at Meiji University and then at Senshu University, graduating in 1944.