Ōyama Iwao
Following the Meiji Restoration, he accompanied Ōyama Iwao, Shinagawa Yajirō and Nakahama Manjirō to Germany in 1871 during the Franco-Prussian War as official military observers, visiting Frankfurt, Berlin and calling on Paris during a ceasefire. Returning to Frankfurt, the delegation purchased modern currency printing machines, which were used by the Meiji government to print its first banknotes.