Fortieth Army (Japan)
| Japanese Fortieth Army | |
|---|---|
| Active | January 12, 1945 - August 15, 1945 | 
| Country | Empire of Japan | 
| Branch | Imperial Japanese Army | 
| Type | Infantry | 
| Role | Corps | 
| Garrison/HQ | Ijuin, Kagoshima | 
| Nickname(s) | Yō (陽, positive) | 
| Engagements | Operation Downfall | 
The Japanese 40th Army (第40軍, Dai-yonjyū gun) was an army of the Imperial Japanese Army during the final stages of World War II.