Swimming at Okazaki
Oai no kata was born in Okazaki and was both beautiful and strong, although of low social status. One day while swimming in a river, a young man tried to bother her, but she quickly defeated him. According to the cartouche, even the shogun Tokugawa Ieyasu praised her courage.
Ukiyo-e woodblock prints by (Toyohara) Yoshu Chikanobu, from the late 19th century [source]
Source: bibliodyssey.blogspot.com