Yasujiroʼs father, Toranosuke was the sixth head of the Ozu Shinshichiʼs family, which is a branch of the merchant Ozu Yoemonʼs family. Yoemonʼs family did business together with the branch family, which was unusual of a merchant in Matsusaka. Therefore Yoemonʼs house is the root of Yasujiro.

Apart from the Ozu Seizaemonʼs family in Honmachi, this place was called “Doteshin”.