Katsu Kokichi

Katsu Kokichi was born Otani Kokichi in Edo. He was a low-ranking samurai who was adopted by the Katsu family in order to marry the only Katsu daughter, Nobuko. Kokichi's father, Otani Heizo, was a minor official in the shogunate. His half brother, Otani Hikoshiro, was twenty-five years older than Kokichi. After their father's retirement as family head, Hikoshiro became responsible for all the family; he was a noted calligrapher and Confucian scholar and was twice distinguished as district administrator within the shōgun's domain.