| Unit Name: | Japanese Forty-Third Army |
| Dates: | March 10, 1945 – August 15, 1945 |
| Country: | Empire of Japan |
| Branch: | Imperial Japanese Army |
| Type: | Infantry |
| Role: | Corps |
| Garrison: | Jinan, Shandong, China |
| Nickname: | 秀嶺 |
| Battles: | Operation Downfall |
The was an army of the Imperial Japanese Army during the final stages of World War II.
The Japanese 43rd Army was formed on March 10, 1945 under the Northern China Area Army as part of the last desperate defense effort by the Empire of Japan to deter possible landings of Allied forces in Shandong province during Operation Downfall. The Japanese 43rd Army consisted mostly of poorly trained and poorly equipped reservists from other units.
It was demobilized at the surrender of Japan on August 15, 1945 at Jinan without having seen combat.
| Name | From | To | |
| Commanding officer | Lieutenant General Tadayasu Hosokawa | 31 March 1945 | September 1945 |
| Chief of Staff | Major General Mitsuo Kubo | 31 March 1945 | 1 June 1945 |
| Chief of Staff | Major General Mitsuru Samukawa | 1 June 1945 | September 1945 |