| Katō Tomosaburō | |
| Native Name: | 加藤 友三郎 |
| Office: | Prime Minister of Japan |
| 1Blankname: | Regent |
| 1Namedata: | Hirohito |
| Term Start: | 12 June 1922 |
| Term End: | 24 August 1923 |
| Predecessor: | Takahashi Korekiyo |
| Successor: | Uchida Kosai (Acting) |
| Office1: | Minister of the Navy |
| Term Start1: | 10 August 1915 |
| Term End1: | 15 May 1923 |
| Predecessor1: | Yashiro Rokuro |
| Successor1: | Takeshi Takarabe |
| Birth Date: | 22 February 1861 |
| Birth Place: | Hiroshima Domain, Aki Province, Japan |
| Death Place: | Tokyo, Japan |
| Death Cause: | Colon cancer |
| Resting Place: | Aoyama Cemetery, Tokyo |
| Party: | Independent |
| Spouse: | Katō Kiyoko (1874–1940) |
| Signature: | KatoTo kao.png |
| Alma Mater: | Imperial Japanese Naval Academy |
| Serviceyears: | 1873–1923 |
| Rank: | Marshal Admiral |
| Commands: | Tsukushi, Naval Affairs Bureau, Kure Naval District, 1st Fleet |
| Battles: | First Sino-Japanese War Russo-Japanese War Battle of Tsushima |
| Awards: | Order of the Chrysanthemum (Grand Cordon) |
Marshal-Admiral Viscount was a career officer in the Imperial Japanese Navy, cabinet minister, and Prime Minister of Japan from 1922 to 1923.
Born in Hiroshima, Aki Province (modern Hiroshima Prefecture) to a samurai family, Katō enrolled in the 7th class Imperial Japanese Naval Academy and graduated second out of a class of 30 cadets. He specialized in both naval artillery and in navigation.
After his commissioning as lieutenant, Katō served on the corvette in 1887, followed by the cruiser . During the First Sino-Japanese War, he served in a combat position as gunnery officer on the cruiser . After the end of the war, he served in numerous staff positions before promotion to commander. He was executive officer on the battleship, and captain of the . He was promoted to rear admiral on 1 September 1904.
During the Russo-Japanese War, Katō served as chief of staff to Admiral Tōgō Heihachirō on the battleship, assisting in Japan's victory at the Battle of Tsushima. During this time, he suffered from a very weak stomach, and was vomiting as he issued orders throughout the battle, despite having taken large amounts of medication.
Katō became Vice Minister of the Navy in 1906, and was promoted to vice admiral on 28 August 1908. In 1909, he was appointed commander of the Kure Naval District, and in 1913 became Commander in Chief of the Combined Fleet.
Katō became Minister of the Navy in August 1915, days before his promotion to full admiral on 28 August 1915. He served in this post in the cabinets of Ōkuma Shigenobu, Terauchi Masatake, Hara Takashi, and Takahashi Korekiyo. Under Hara and Takahashi, Katō was Japan's chief commissioner plenipotentiary to the Washington Naval Conference, and worked with Ambassador Shidehara Kijurō in the negotiations that led to the Five-Power Treaty.
Following his return to Japan, Katō was appointed 21st Prime Minister of Japan in recognition of his performance at the Washington Naval Conference. His cabinet consisted mainly of bureaucrats and members of the House of Peers, which proved unpopular with the Imperial Japanese Army. During his tenure as prime minister, Katō implemented the provisions of the Washington Naval Agreement, withdrew Japanese forces from Shandong in China and ended Japanese participation in the Siberian Intervention. Katō succumbed to late-stage colon cancer and died a little over a year into his term.
Katō was given the honorary rank of Marshal Admiral the day before his death, and posthumously awarded the Grand Cordon of the Supreme Order of the Chrysanthemum and his title raised to shishaku (viscount).
His death came only a week before the Great Kantō earthquake of 1923, and therefore Japan was without a prime minister during that disaster.
Katō's grave is at Aoyama Cemetery, Tokyo.
From the corresponding article in the Japanese Wikipedia
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