He was appointed to Hyobu shojo (Junior Secretary of the Ministry of War) in Hyobusho (Ministry of War) for eight months from March to October in 1870, and he devoted himself in establishment of a foundation for the Imperial Japanese Navy.
1870年（明治3年）3月～10月までの8ヶ月間、兵部省兵部少丞に就任し、日本海軍の基礎創りに尽力する。