|Born||20 November 1894
Fukuoka prefecture, Japan
|Died||26 December 1978(aged 84)|
|Allegiance||Empire of Japan|
|Service/branch||Imperial Japanese Army|
|Years of service||1905–1945|
|Commands held||IJA 6th Division|
|Battles/wars||Second Sino-Japanese War
World War II
Tsutomu Akinaga (秋永力 Akinaga Tsutomu ?, 20 November 1894 – 26 December 1978) was a general in the Imperial Japanese Army, commanding the Japanese ground forces on Bougainville of 1945 in the closing months of the war.
Akinaga was born in Fukuoka prefecture. He graduated from the 28th class of the Imperial Japanese Army Academy in May 1916, and from the 38th class of the Army Staff College in December 1926, after which he served as a staff officer with the IJA 4th Division.
During the Second Sino-Japanese War, Akinaga was chief of the Maneuvers Section of 6th Division between 1937–1938 and was active at the Battle of Nanking and the Battle of Wuhan. In July 1938, he was promoted to colonel. In December of the same year, following the Battle of Lake Khasan against the Soviet Union, he was given command of the IJA 75th Regiment where he served until 1940. Akinaga was appointed chief of staff of 13th Division, stationed in China at the start of the Pacific War. Akinaga was promoted to major general in August 1941 and in August 1942 was appointed commanding officer of the Infantry Group of 57th Division stationed in Manchukuo.
As the war situation in southwest Asia began to deteriorate for Japan, Akinaga was appointed chief of staff of the IJA 17th Army, with its headquarters on Bougainville in the Solomon Islands in September 1943. He was promoted to lieutenant general March 1945, and in April became commander of the IJA 6th Division,  leading them in operations against Australian forces as they advanced south towards Buin, Papua New Guinea, with notable battles occurring at Slater's Knoll and along the Hongorai River.
After surrendering, he was returned home to Japan. He died on 26 December 1978.
- Fuller, Richard (1992). Shokan: Hirohito's Samurai. London: Arms and Armor. ISBN 1-85409-151-4.
- Tanaka, Kengoro (1980). Operations of the Imperial Japanese Armed Forces in the Papua New Guinea Theater During World War II. Tokyo: Japan Papua New Guinea Goodwill Society.
- Ammenthorp, Steen. "Tsutomu Akinaga". The Generals of World War II.
- Budge, Kent. "Akinaga Tsutomu". Pacific War Online Encyclopedia.
- Tsutomu Akinaga, www.generals.dk
- Tanaka (1980), p. 286.
- Tanaka (1980), pp. 283–290.