Promoted to lieutenant in 1889 , he was a specialist in torpedo warfare .
Promoted to lieutenant in 1889 , he was assigned as chief torpedo officer on the cruiser Yoshino in 1893 on its year - long voyage to the United Kingdom .
Promoted to lieutenant in 1889 , he was a specialist in torpedo warfare and was assigned as chief torpedo officer on the cruiser Yoshino in 1893 on its year - long voyage to the United Kingdom .