The U.S. Air Force said an airman assigned to the 374th Airlift Wing at Yokota Air Base was found dead in Shimoda, Japan.
He was found on Wednesday, August 20. The cause of death is under investigation, the Air Force said.
Officials did not immediately name the airman out of respect for his loved ones. His next-of-kin have been notified.
"Today is a difficult day for Team Yokota," said Col. Richard McElhaney, 374th Airlift Wing commander.
"Thank you to our installation law enforcement officials and local community partners within the Shimoda Police Service for their assistance.
"Those affected are on the front of our minds, and our base support agencies are standing by to support members of the community suffering from this loss."
This is a breaking news story. Updates to follow.