| Unit Name: | Japanese Fifty-Eighth Army |
| Dates: | April 7, 1945 – August 15, 1945 |
| Country: | Empire of Japan |
| Branch: | Imperial Japanese Army |
| Type: | Infantry |
| Role: | Corps |
| Battles: | Operation Downfall |
The was an army of the Imperial Japanese Army during the final days of World War II.
The Japanese 58th Army was formed on April 7, 1945, under the Japanese 17th Area Army as part of the last desperate defense effort by the Empire of Japan to deter possible landings of Allied forces in Jejudo (Saishuto) island during Operation Downfall. The Japanese 58th Army consisted mostly of poorly trained reservists, conscripted students and home guard militia. It was demobilized at the surrender of Japan on August 15, 1945, without having seen combat.
| Name | From | To | |
| 1 | 7 April 1945 | 15 August 1945 | |
| Name | From | To | |
| 1 | 6 April 1945 | 19 August 1945 | |
| 2 | 19 August 1945 | 1 September 1945 | |