Gengo's older brother, Gunnosuke Gengo, along with Katsu Kaishu and Yadabori, was the only Kakegawa feudal lord to receive the first Nagasaki Dutch Navy training. However, by the time of the second period, even though he had not accepted any new people other than the Bakushin, the fact that Gengo went to Nagasaki meant that he had an informal tour of the training as a subordinate of Yadabori.