In February 1896, he married Murata Chiyoko from the Fukui Domain, and on 24 October 1896, he was appointed as a member of the receiving commission sent to London for battleship Fuji.

[1]: pp.308–309  He was promoted to squad leader on Fuji, Chief Navigation Officer of IJN Japanese cruiser Tatsuta (1894), and then assigned to Consulate General of Japan in Saint Petersburg.

He entered into the Russo-Japanese War in 1904 as the Chief Gunnery Officer of IJN Asahi and experimented with a salvo-firing central control of main guns during the Battle of the Yellow Sea on 10 August 1904, contributing to the killing of Admiral Wilgelm Vitgeft and his staff onboard Russian flagship Tsesarevich after the Japanese fleet flagship Mikasa handed over the leading battle position to Asahi.

His primitive voice-command control system was adopted by the entire Combined Fleet, and he was promoted to the Chief Gunnery Officer of flagship Mikasa in March 1905.

In 1930 he resigned rather than attend a dinner in honour of US Ambassador William Richards Castle Jr., in protest against the naval restrictions negotiated with him.