Tsutomu Sakuma
| Tsutomu Sakuma | |
|---|---|
Lieutenant Tsutomu Sakuma
|
|
| Born | 13 September 1879 Fukui, Japan |
| Died | April 15, 1910 (aged 30) Inland Sea, Japan |
| Allegiance | Empire of Japan |
| Service/branch |
 Imperial Japanese Navy
|
| Years of service | 1901-1910 |
| Rank | Lieutenant |
| Commands held |
No.4 submarine Staff Officer 1st Fleet The destroyer No.6 submarine |
| Battles/wars | Russo-Japanese War |
Tsutomu Sakuma (佐久間 勉? Sakuma Tsutomu, September 13, 1879 – April 15, 1910) was a career naval officer in the Imperial Japanese Navy, and a pioneer submarine commander, known primarily as the commanding officer during the sinking of Submarine No.6.
Born in Mikata District Fukui prefecture (present-day city of Wakasa, Fukui), to the family of a Shinto priest, Sakuma graduated from the 29th class of the Imperial Japanese Naval Academy in 1901. One of his classmates was the future Navy Minister and Prime Minister of Japan Mitsumasa Yonai. He was assigned to the cruiser Azuma shortly before the start of the Russo-Japanese War. He subsequently served with the 15th Torpedo Boat Flotilla, and was on board the cruiser Kasagi during the Battle of Tsushima on May 26, 1905.
After completing the torpedo warfare school, Sakuma served on the submarine tender Karasaki and was later a squad leader on the Japanese cruiser Tsushima. He started to get involved in the submarine service in 1906, first taking the command of the No.4 submarine, and eventually the Japan-built Holland-type No.6 in 1908.
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