Dewa attended the 5th class of the Imperial Japanese Naval Academy, graduating 6th out of 43 cadets. He was appointed a midshipman on 16 August 1878, promoted to ensign on 12 August 1880 and promoted to sub-lieutenant on 27 February 1883. He served as a junior officer on several vessels of the early Japanese Navy, including the corvette Tsukuba, ironclad warship Fusō, sloop Hōshō, ironclad warship Ryūjō, corvette Amagi, and cruisers Asama, Naniwa and Takachiho. He was promoted to lieutenant on 7 April 1886 and to lieutenant-commander on 16 October 1890. From 1886-1890, he was executive officer on the cruiser Takao. From 1893-1893, he was captain of the gunboats Akagi, and Tatsuta and was promoted in rank to captain on 7 December 1894.[2]
During the First Sino-Japanese War (1894–95), Dewa served as a staff officer of the "Western Seas Fleet", a defensive force patrolling home waters. In 1893, he became Director of the Personnel Section in the Navy Ministry. He later captained the cruiser Tokiwa in 1898.
On 9 July 1912, he was promoted to full admiral. Dewa Shigeto was the first non-Satsuma person (and the first Aizu person) to attain the rank of full admiral in the Imperial Japanese Navy. The first person of Aizu background to attain the rank of admiral was Hidematsu Tsunoda,[3] and Matsudaira Morio the son of the former Aizu lord Matsudaira Katamori as a rear admiral.
On the occasion of the Siemens-Vickers Navy Armament Scandal, as Chairman of the Commission of Inquiry he concentrated his efforts on the cleanup of corruption from the Navy. This eventually led to the fall of Admiral Yamamoto Gonnohyōe's cabinet in March 1914. Dewa retired from active service in 1925.
In his later years, Dewa was involved with the construction of memorials to the casualties of the Battle of Aizu.[4] His grave is at the Aoyama Cemetery in Tokyo.
Honors
From the article in the Japanese Wikipedia
Order of the Sacred Treasure, 4th Class
Grand Cordon of the Order of the Rising Sun (1 April 1906)
Order of the Golden Kite, 2nd Class (1 April 1906)
Baron (21 September 1907)
Grand Cordon of the Order of the Rising Sun with Paulownia Flowers (27 January 1930; posthumous)
Grand Cordon of the Order of the Plum Blossoms of the Korean Empire
Schencking, J. Charles (2005). Making Waves: Politics, Propaganda, And The Emergence Of The Imperial Japanese Navy, 1868-1922. Stanford University Press. ISBN0-8047-4977-9.
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